Pork Tenderloin Recipes UK with Mustard and Apple

This British-inspired roast pork tenderloin pairs lean pork with sweet apple, onion and a tangy mustard pan sauce. Searing the meat before roasting builds colour, while a short rest and a thermometer help keep it juicy; the simple apple-and-stock sauce works for a Sunday lunch or an easy weeknight dinner.

Ingredients

2 pork tenderloins, about 2 lb (900 g) total, trimmed of silver skin
1 medium eating apple, about 6 oz (180 g), cored and cut into thin wedges
1 small brown or yellow onion, about 5 oz (140 g), peeled and thinly sliced
1 tbsp (15 ml) olive oil
1 tsp (5 g) fine salt
½ tsp (1 g) freshly ground black pepper
1 tsp (2 g) dried thyme, or 1 tbsp (4 g) fresh thyme leaves
1 tbsp (15 g) unsalted butter
½ cup (120 ml) unsweetened apple juice
½ cup (120 ml) low-salt chicken stock
1 tbsp (15 g) Dijon mustard
1 tsp (5 ml) Worcestershire sauce
1 tsp (3 g) plain flour mixed with 1 tbsp (15 ml) cold water, optional, for thickening
1 tbsp (4 g) chopped fresh parsley, optional, to finish

Instructions

Heat the oven and prepare the pork. Set a rack in the centre of the oven and heat it to 400°F (200°C). Pat the tenderloins dry with kitchen paper. Remove any shiny, tough silver skin with a small sharp knife, taking care not to cut away much meat. If one end is much thinner than the other, tuck it under and tie it loosely with kitchen string so the meat cooks more evenly. Patting the surface dry helps it brown rather than steam.
Season and prepare the apple. Mix the salt, pepper and thyme, then rub the mixture over the pork. Slice the apple and onion and keep them ready beside the hob. Tenderloins vary in shape and thickness, so aim to have the two pieces roughly similar in thickness; if one is much longer, you can fold the narrow end under and secure it. Do not salt the meat far ahead of cooking, as the short preparation time here is enough for the seasoning to cling.
Sear the tenderloins. Heat the olive oil in a large ovenproof frying pan over medium-high heat. When the oil shimmers, add the pork and brown it on all sides, turning with tongs, for about 5–6 minutes in total. Work in two batches if the pan is crowded; crowded meat releases moisture and will not colour as well. Transfer the browned pork to a plate briefly. If you do not have an ovenproof pan, use a regular frying pan and move the pork and vegetables to a small roasting tin before baking.
Start the apple and onion base. Reduce the heat to medium and add the butter to the same pan. Stir in the sliced onion and apple, scraping up the browned bits left by the pork. Cook for 2–3 minutes, just until the onion starts to soften and the apple edges take on a little colour. Spread the mixture into an even layer, then set the pork on top. The apple will soften further in the oven, so it does not need to be cooked through at this stage.
Roast and check the temperature. Put the pan in the oven and roast for about 18–21 minutes, turning the tenderloins once if they are not browning evenly. Start checking at 16 minutes, since a narrow tenderloin can finish sooner. Insert a food thermometer into the thickest part of each piece without touching the pan. USDA FSIS guidance gives whole cuts of pork a safe minimum internal temperature of 145°F (63°C), followed by a 3-minute rest. If either piece has not reached that temperature, return it to the oven and check again after a few minutes; colour alone is not a reliable doneness test.
Rest the pork and make the sauce. Transfer the cooked pork to a clean board, loosely cover it with foil and rest for 8 minutes. Leave the apple and onion in the pan. Put the pan on the hob over medium heat, carefully remembering that its handle is hot, and pour in the apple juice and stock. Stir in the Dijon mustard and Worcestershire sauce, scraping the base to release the browned flavour. Simmer for 3–4 minutes while the pork rests. For a thicker sauce, whisk in the flour-and-water mixture a little at a time and simmer for another minute. Skip it for a lighter, more spoonable sauce.
Slice and serve. After the rest, check that the pork has rested for at least 3 minutes after reaching 145°F (63°C). Cut it across the grain into slices about ½ inch (1.25 cm) thick. Taste the sauce and adjust the seasoning if needed; stock and Worcestershire sauce can already be salty, so taste before adding extra salt. Spoon the soft apple and onion over the slices, pour the sauce around them, and scatter with parsley if using.

Tips

Remove the silver skin. The thin, pearly membrane on a tenderloin stays chewy after cooking and can make the meat curl. Slide the knife just beneath it, angle the blade slightly upwards, and pull the membrane taut as you cut. A little trimming is enough; removing too much meat wastes a useful portion.
Use the thermometer, not the clock alone. Tenderloins differ in thickness, and oven temperatures can vary. Begin checking early and measure the thickest section of each piece. The meat may still look slightly pink at a safe temperature, which is why a temperature reading is more useful than judging by colour. Letting it rest also gives the juices time to settle before slicing.
Choose a firm apple. A crisp eating apple such as Braeburn or Pink Lady keeps some shape and balances the savoury mustard. A Bramley cooking apple is a good UK alternative if you prefer a softer, sharper sauce; it breaks down more readily, so add it in larger wedges and expect a less distinct apple texture.
Make practical swaps. If Dijon mustard is unavailable, use wholegrain mustard for a more textured, slightly sharper sauce. For a dairy-free version, replace the butter with another teaspoon of olive oil. If you have no apple juice, use extra stock and add a small splash of cider vinegar or lemon juice at the end for brightness; the result will be less fruity.

Serving Suggestions

Serve the sliced pork with roast potatoes, mashed potatoes or buttered new potatoes to catch the apple-mustard sauce. For a classic British-style plate, add a green vegetable such as peas, green beans or steamed cabbage, and perhaps roasted carrots or parsnips. If you are serving a larger Sunday lunch, the tenderloin also sits comfortably alongside Yorkshire puddings, though they are optional rather than necessary for this lighter cut.

For a less formal meal, spoon the pork and sauce over creamy mashed potatoes and add a crisp green salad dressed with a little cider vinegar. You can also serve the slices in warm rolls with extra mustard and a spoonful of the cooked apple and onion. Keep the sauce separate until serving if you want to preserve the contrast between tender meat and fresh, crunchy salad.

Variations

Herby version: Replace the dried thyme with chopped fresh sage or rosemary. Both pair well with pork, but rosemary is more assertive, so start with about 1 teaspoon (1 g) of finely chopped leaves rather than using a full tablespoon. A little chopped sage stirred into the sauce just before serving gives it a savoury, autumnal flavour.

Apple and wholegrain mustard: Swap the Dijon for 1 tablespoon (15 g) wholegrain mustard. Its mustard seeds give the sauce a rustic texture and a gentler, less smooth finish. If the sauce tastes too sharp, stir in a teaspoon (5 ml) of honey or maple syrup; taste first, because sweet apple juice may already provide enough balance.

Use pears instead: Replace the eating apple with one firm pear of about 6 oz (180 g). Pear makes the sauce milder and a little sweeter, so finish it with a small squeeze of lemon juice if it needs more lift. Avoid very ripe pears, which can collapse quickly and make the pan sauce overly soft.

Make it gluten-free: Omit the optional flour slurry and leave the sauce unthickened, or use a gluten-free flour blend in the same quantity. Check the labels on the stock and Worcestershire sauce, as some products contain ingredients that may not suit a gluten-free diet. Simmering the sauce for a few extra minutes will concentrate it without a thickener.

Storage and Reheating

Transfer leftover pork and sauce to a shallow, covered container and refrigerate within 2 hours of cooking. Keep them chilled and use within 3–4 days. Store the pork with some sauce if possible, as the moisture helps protect the slices from drying out. For longer storage, freeze in a well-sealed container for up to 2–3 months for best quality, then thaw in the refrigerator rather than on the counter. The apple may become softer after freezing, but the flavour should still work well with the meat.

Reheat only the amount you plan to eat. Put the pork and sauce in a covered pan over low heat, adding a splash of stock or water if the sauce has thickened; turn the slices once and heat gently until steaming hot throughout. Alternatively, microwave in a covered, microwave-safe dish, stirring or rearranging halfway through. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the centre of the thickest portion with a food thermometer. Avoid prolonged high heat, which can make lean tenderloin dry and firm.

Frequently Asked Questions

Is pork tenderloin the same as pork loin?

No. Tenderloin is a long, narrow muscle from inside the animal, while pork loin is a larger, wider cut that may be sold as a roast or chops. They cook at different rates and are not interchangeable without adjusting the method and timing. This recipe is specifically written for two small tenderloins weighing about 900 g in total.

How long should I cook pork tenderloin in the oven?

After browning, these tenderloins take about 18–21 minutes at 400°F (200°C), but the exact time depends on their thickness and your oven. Begin checking at 16 minutes with a thermometer. Cook until the thickest part reaches 145°F (63°C), then let the pork rest for at least 3 minutes; this recipe rests it for 8 minutes before slicing.

Can I make this recipe without searing the pork?

Yes, but you will miss some of the browned flavour that forms in the pan and carries into the sauce. If you skip searing, put the seasoned pork on top of the apple and onion and roast it until it reaches the same safe temperature. The cooking time may be a little different, so check early and use the thermometer rather than relying on a fixed number of minutes.

Can I prepare the pork ahead?

You can trim and season the tenderloins, slice the onion and prepare the apple shortly before cooking. For the best texture, cut the apple close to cooking time because exposed cut surfaces can brown. Keep raw pork covered in the refrigerator and separate from ready-to-eat foods, then cook it promptly. The finished dish can also be cooked ahead and refrigerated, though reheated slices are usually less juicy than freshly cooked pork.

What can I use instead of apple juice?

Use an equal amount of low-salt chicken stock, then add a small splash of cider vinegar or lemon juice to the finished sauce if it tastes flat. You can also use unsweetened pear juice for a softer, sweeter fruit note. Avoid replacing the juice with a large amount of vinegar: the sauce needs a little acidity, not a sour flavour.

Why is my pork tenderloin dry?

Lean tenderloin can dry out when it is cooked well past its safe temperature, sliced immediately without resting, or left over heat for too long. Check both tenderloins early, since a thinner piece may finish first, and take them out once they reach 145°F (63°C). Resting before slicing and serving with the pan sauce help keep the meal moist and enjoyable.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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