This British-style baked marrow is a halved, oven-roasted marrow filled with lentils, tomato, cheddar and crisp breadcrumbs. The first bake softens the flesh, while the savoury filling and crumb topping make a generous vegetarian main; marrow sizes and family-style fillings vary, so the method is easy to adapt.
Ingredients
- 1 medium marrow, about 2 lb 10 oz (1.2 kg)
- 1 tablespoon olive oil (15 ml), divided
- 1 medium onion, finely diced, about 1 cup (150 g)
- 2 garlic cloves, finely chopped, about 2 teaspoons (6 g)
- 1 can chopped tomatoes, 14 oz (400 g), drained well; this gives roughly 1½ cups (240 g) tomatoes
- 1 cup cooked brown or green lentils, drained (190 g)
- 1 teaspoon English mustard (5 g)
- ½ teaspoon fine salt (3 g), plus a little for the marrow
- ¼ teaspoon black pepper (about 0.5 g)
- 1¼ cups mature cheddar, grated (125 g)
- 1 cup dry breadcrumbs (60 g)
- ¼ cup chopped fresh parsley (15 g)
- 1 teaspoon finely grated lemon zest (2 g), optional
Instructions
- Heat the oven and prepare the marrow. Set a conventional oven to 400°F (200°C), or fan oven to 350°F (180°C). Trim the ends from the marrow and cut it lengthwise in half. Scoop out the soft, seedy centre with a spoon, leaving a sturdy border of flesh and skin. If the marrow is particularly large, remove the loose seeds and pulp but keep as much firm flesh as possible. Brush the cut sides with about half the oil and season lightly with salt.
- Give the halves their first bake. Put the marrow halves cut-side up in a roasting tin or large baking dish. Roast for 20 minutes, until the flesh is beginning to soften but the halves still hold their shape. A very large or unusually firm marrow may need a few extra minutes at this stage. If liquid collects in the hollow, carefully spoon it away before adding the filling.
- Cook the filling while the marrow roasts. Warm the remaining oil in a frying pan over medium heat. Add the onion and cook for 6–8 minutes, stirring occasionally, until soft and translucent rather than browned. Add the garlic and cook for 30 seconds. Stir in the drained tomatoes, lentils, mustard, salt and pepper. Simmer for 4–5 minutes, stirring, so the mixture thickens and excess moisture evaporates. Take the pan off the heat and mix in half the cheddar, the parsley and the optional lemon zest.
- Fill and top the marrow. Take the tin from the oven. Divide the lentil mixture between the two hollows, mounding it gently rather than packing it tightly. Stir the remaining cheddar into the breadcrumbs and scatter the mixture evenly over the filling. If the halves are rocking, make a small foil ring underneath each one to keep them level.
- Bake until tender and golden. Return the dish to the oven for 30 minutes. The topping should be crisp and golden in places, the filling hot throughout, and a knife should slide into the marrow flesh with little resistance. If the topping browns before the marrow is tender, loosely cover it with foil for the remaining baking time. Rest for 5 minutes before lifting the halves from the dish; this helps the filling settle and makes serving easier.
Tips
- Choose a marrow that suits your dish. A medium marrow is easier to handle and tends to have firmer flesh than an overgrown one. Look for unbroken skin and no soft, damaged patches. If yours is very large, it will still work, but remove the mature seeds and check tenderness during the first bake rather than relying blindly on the clock.
- Keep the filling fairly dry. Marrow releases water as it cooks, and wet filling can turn the base soft. Drain tinned tomatoes thoroughly, simmer the filling until it is thick, and tip away any liquid that gathers in the hollow after the first roast. Avoid adding tomato juice or extra stock unless the mixture looks genuinely dry.
- Use a stable baking dish. The halves can roll, especially when the marrow is round. A snug roasting tin or a little crumpled foil tucked beside each half will stop them tipping. Keep the cut sides facing up so the filling stays in place.
- Adjust for what is in your cupboard. Use canned or home-cooked lentils, but drain either well. If you have only dried breadcrumbs, they are ready to use; fresh breadcrumbs work too, though they may make a softer, less crunchy topping. Parsley can be replaced with thyme leaves or chopped chives.
Serving Suggestions
Serve each person a filled half, or cut the baked marrow crosswise into thick portions for a buffet-style meal. It is substantial enough to be the centre of a vegetarian supper, particularly with boiled new potatoes, buttery mash or crusty bread to catch the tomato juices. For a lighter plate, add a crisp green salad dressed with a sharp vinaigrette, or serve peas, green beans or steamed cabbage alongside.
If the marrow is especially large, one half may be enough for two people when served with sides. Spoon any filling that escapes onto the plate rather than leaving it behind in the baking dish. A little extra grated cheddar or chopped parsley at the table is optional, but the filling is already seasoned and cheesy, so taste before adding more salt.
Variations
Make it without lentils: Replace the cooked lentils with 1 cup (150 g) drained cannellini beans, lightly crushed. They give a softer, creamier filling with a milder flavour. Chickpeas also work, though their firmer texture makes the stuffing less cohesive.
Add a different cheese: Swap some or all of the cheddar for grated Lancashire, Red Leicester or a mature hard cheese. A milder cheese makes the topping less savoury; a strongly flavoured cheese gives the filling a more pronounced tang. For a dairy-free version, use a suitable melting alternative and check its saltiness before seasoning.
Use a different herb or spice: Thyme gives the dish a woodier, more savoury note, while chives keep it fresh and mild. A pinch of smoked paprika or ground cumin can add warmth, but use a light hand so it does not overpower the marrow. The lemon zest is another optional lift; omit it for a more straightforward tomato-and-cheddar flavour.
Make individual portions: If you have small marrows, halve and fill them in the same way. Start checking tenderness after the initial 15-minute bake, as smaller pieces can cook more quickly. You may also spoon leftover filling into a small ovenproof dish and bake it alongside the marrow until hot and golden.
Storage and Reheating
Allow leftovers to stop steaming, then refrigerate them within 2 hours of cooking in a covered container. For the best texture, store portions rather than leaving a large stuffed half in the baking dish. Cooked marrow keeps for 3–4 days in the refrigerator. The topping will soften as it sits, and the marrow may release a little more liquid, but the flavour remains suitable for reheating within that window.
Reheat a portion in an oven set to 350°F (180°C) until hot all the way through; loosely cover it at first if the breadcrumb topping is already dark, then uncover for the final few minutes. You can also microwave a portion in a microwave-safe dish, though the topping will not stay crisp. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the centre with a food thermometer. Reheat only the amount you plan to eat, rather than cooling and warming the same portion repeatedly.
Freezing is possible, although marrow becomes softer and more watery after thawing, so it is best if texture is not the priority. Freeze well-wrapped individual portions for up to 2 months for best quality, thaw them in the refrigerator, and reheat until they reach 165°F (74°C). Do not leave cooked portions at room temperature for extended storage.
Frequently Asked Questions
What is marrow in a UK recipe?
In the UK, a marrow is a mature type of summer squash, closely related to a courgette. It is usually much larger, with a thicker skin and a roomy centre that can be scooped out and stuffed. It is not bone marrow.
Do I need to peel the marrow?
No. The skin helps the halves keep their shape while baking and is usually fine to eat once tender. If the skin is unusually tough, peel a few narrow strips lengthwise before cooking, or peel it after baking if you prefer not to eat it.
Can I prepare baked marrow ahead?
You can make the lentil filling up to 2 days ahead and keep it covered in the refrigerator. For the best result, roast and fill the marrow on the day you plan to serve it, since cut marrow and filling can both release moisture while waiting. If assembling ahead is necessary, keep the components separate and refrigerate them promptly, then fill and bake when ready.
How can I tell when the marrow is cooked?
Test the thickest part of the flesh with a small knife. It should be tender enough for the blade to enter easily, but the skin and sides should still hold the stuffed half together. If the topping is ready first, cover the dish loosely with foil and continue baking until the flesh is soft.
Why has my baked marrow turned watery?
Very mature marrow naturally contains plenty of moisture, and the tomatoes add more. Drain the tinned tomatoes, simmer the filling until thick, and remove liquid from the hollows after the first bake. A shallow dish can also help moisture evaporate rather than collect around the halves.
Can I make this recipe vegan or gluten-free?
For a vegan version, use a dairy-free cheese that melts and breadcrumbs labelled vegan; the lentil filling itself contains no meat or dairy. For a gluten-free version, choose certified gluten-free breadcrumbs. Since dairy-free cheeses and packaged crumbs vary in salt and browning, taste the filling before topping and check the dish a little early near the end of baking.
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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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