Marrow Vegetable Recipe: Baked Stuffed Marrow

This baked stuffed marrow is a home-style vegetable dish made with tender marrow halves filled with lentils, tomatoes, herbs and a golden layer of cheese. It is a practical way to turn a large, mild-tasting squash into a hearty main course, and the filling can be adapted to suit what you have on hand.

Ingredients

1 large marrow, about 3 lb (1.4 kg), washed
2 tbsp (30 ml) olive oil, divided
1 tsp (6 g) fine salt, divided, plus more to taste
½ tsp (1 g) freshly ground black pepper, divided
1 medium yellow onion, about 5 oz (150 g), finely chopped
3 garlic cloves, about ⅓ oz (9 g), minced
1 medium red bell pepper, about 5 oz (150 g), diced
1½ cups (270 g) cooked brown or green lentils, drained; or one 15 oz (425 g) can, drained and rinsed
1 can (14.5 oz/411 g) chopped tomatoes
1 tbsp (16 g) tomato paste
1 tsp (2 g) smoked paprika
1 tsp (1 g) dried oregano
½ cup (30 g) plain breadcrumbs
1 cup (100 g) grated cheddar cheese
2 tbsp (8 g) chopped fresh parsley
1 tbsp (15 ml) lemon juice, optional

Instructions

Heat the oven and prepare the marrow. Set a rack in the middle of the oven and heat it to 400°F (200°C). Line a rimmed baking sheet or shallow roasting pan with parchment. Trim the ends from the marrow and cut it in half lengthwise. Use a spoon to scoop out the soft, seedy centre, leaving a sturdy shell about ½ inch (1 cm) thick. If the marrow is especially mature and the centre is very fibrous, remove a little more of it. Brush the cut surfaces and cavities with 1 tablespoon (15 ml) of the olive oil, then season with ½ teaspoon (3 g) of the salt and ¼ teaspoon (0.5 g) of the pepper.
Begin roasting the shells. Place the halves cut side up on the prepared pan. Roast for 18 minutes, until the flesh is just beginning to soften but the shells still hold their shape. Very large or particularly firm marrow may need another 3 to 5 minutes; it should not be so soft that it collapses when filled. Take the pan out of the oven and leave the oven on.
Cook the vegetables. While the marrow roasts, heat the remaining 1 tablespoon (15 ml) of oil in a large skillet over medium heat. Add the onion and bell pepper and cook for about 5 minutes, stirring now and then, until they soften. Stir in the garlic and cook for 30 seconds, just until fragrant. If the garlic starts to brown, lower the heat so it does not turn bitter.
Make a thick lentil filling. Add the lentils, chopped tomatoes, tomato paste, smoked paprika, oregano, remaining ½ teaspoon (3 g) salt and remaining ¼ teaspoon (0.5 g) pepper to the skillet. Stir well and bring the mixture to a gentle simmer. Cook uncovered for about 7 minutes, stirring occasionally, until some of the tomato liquid has evaporated and the filling is thick enough to mound on a spoon. Take the pan off the heat, stir in the parsley and optional lemon juice, then taste and adjust the seasoning. A little acidity from the lemon makes the tomato taste brighter, but it is not essential.
Fill the marrow. If liquid has collected in the roasted shells, carefully spoon it out so the filling does not become watery. Divide the lentil mixture between the two halves, packing it into the cavities without pressing so firmly that the shells split. Mix the breadcrumbs and grated cheddar together, then scatter the mixture evenly over the filling.
Bake until tender and golden. Return the pan to the oven and bake for 25 minutes. The marrow should be tender when pierced near the edge with a small knife, and the topping should be melted and lightly browned. If the topping needs more colour, switch the oven to broil for 1 to 2 minutes, watching closely because breadcrumbs can burn quickly. Rest the stuffed halves for 5 minutes before cutting each one in half to serve.

Tips

Choose a marrow that will fit your pan. A marrow is a mature summer squash, often sold in the UK and other places where the name is common. It is generally larger and milder than a courgette or zucchini. Choose one with firm, unblemished skin; if you can only find zucchini, use several large ones and reduce the initial roast to about 10 minutes because they soften faster.
Keep the filling fairly dry. Marrow contains plenty of water, so the tomato mixture should be thick before it goes into the shells. Simmer it for a few extra minutes if it looks soupy. Avoid pouring any liquid left in the roasted cavities back into the filling.
Season in layers. The squash is mild, so seasoning the shells and tasting the lentil mixture before filling makes a noticeable difference. Canned tomatoes and lentils vary in saltiness; add extra salt a pinch at a time rather than assuming the listed amount will suit every brand.
Make the preparation easier. You can chop the vegetables and grate the cheese earlier in the day, then keep them covered in the refrigerator. The assembled dish is best baked just before serving, since storing it unbaked can draw moisture from the filling into the marrow.

Serving Suggestions

Serve stuffed marrow warm as a main course, with one half per person. A crisp green salad with a sharp vinaigrette balances the soft squash and rich cheese, while steamed green beans, broccoli or sautéed greens make a simple vegetable side. If you want a more filling plate, add crusty bread to catch the tomato juices, or serve the marrow with boiled new potatoes, rice or couscous.

A spoonful of plain yogurt or sour cream can be added at the table, along with extra parsley and black pepper. Keep these toppings separate until serving so the breadcrumb crust stays crisp. For a shared meal, bring the roasting pan to the table and cut the halves into portions there; use a broad spatula to support the tender shells as you lift them.

Variations

Make it vegan: Replace the cheddar with ¾ cup (45 g) of nutritional yeast-seasoned breadcrumbs, or use a plant-based grated cheese. Check that the breadcrumbs do not contain dairy. The result will have a crisp topping without the same melted, stretchy finish as cheddar.

Use other beans: Drained chickpeas or white beans can replace the lentils in the same quantity. Lightly mash about one-third of the beans into the tomato mixture so the filling holds together. If using cooked rice instead, use 1½ cups (240 g) and simmer the tomatoes until thick before stirring it in.

Add more vegetables or warmth: Finely diced mushrooms can be cooked with the onion and pepper; give them time to release their moisture before adding the tomatoes. For a little heat, add ¼ teaspoon (0.5 g) chilli flakes with the paprika. A handful of chopped spinach can be stirred into the hot filling at the end, though it may make the mixture slightly softer.

Change the cheese and herbs: Mature cheddar gives a pronounced savoury topping. Monterey Jack or mozzarella melts smoothly but tastes milder, so add a little extra black pepper or parsley. Replace the oregano with dried thyme, or use 1 tablespoon (3 g) fresh thyme leaves if available.

Storage and Reheating

Refrigerate leftovers within 2 hours of cooking. Store portions in a covered, shallow container, or wrap the cooled halves well, and use them within 3 to 4 days. The topping will soften in the refrigerator, but the filling and marrow keep well. For easier reheating, cut the halves into individual portions before chilling.

To reheat in the oven, place a portion in a covered oven-safe dish and warm at 350°F (175°C) until hot throughout; uncover it for the last few minutes to crisp the topping. A microwave is quicker: heat a portion on a microwave-safe plate in short intervals, turning or rearranging it if needed. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the centre with a food thermometer. Freeze portions in airtight freezer-safe packaging for up to 2 to 3 months for best quality, then thaw overnight in the refrigerator before reheating. The marrow may be softer after freezing.

Frequently Asked Questions

Do I need to peel marrow before cooking it?
No. The skin helps the halves hold their shape while they roast and bake, and it is usually tender enough to eat when cooked. If the marrow is unusually large and has very tough skin, you can peel narrow strips from the outside, but avoid peeling it completely or the shells may become fragile.

Can I prepare stuffed marrow ahead of time?
You can make the lentil filling up to 2 days ahead and keep it covered in the refrigerator. Roast and fill the marrow closer to mealtime for the best texture. If you assemble it in advance, refrigerate it promptly and bake it within a day; allow extra oven time if it goes into the oven cold, and check that the centre is hot before serving.

Why did my stuffed marrow turn watery?
Marrow naturally releases moisture as it cooks, and a loose tomato filling adds more. Roast the shells cut side up, remove liquid from their cavities before filling, and simmer the tomato mixture until thick. Also check that canned lentils are well drained. A little juice is normal, but the filling should not be swimming in liquid.

Can I make this recipe without lentils?
Yes. Use drained beans, cooked rice, or a mixture of finely chopped sautéed mushrooms and cooked grains. Keep the total filling close to the amount in the recipe and make sure any replacement is already cooked before it goes into the marrow. Raw grains will not reliably cook through during the short final bake.

How can I tell when the marrow is cooked?
Test the flesh near the edge of a half with the tip of a small knife. It should slide in with little resistance, while the outer shell remains sturdy enough to lift. If the topping is browned but the marrow is still firm, cover the pan loosely with foil and bake for a few more minutes, then test again.

Is marrow the same as zucchini or courgette?
They are closely related summer squashes, but marrow usually means a larger, more mature squash with a thicker shell and a softer, seedier centre. Large zucchini can stand in for marrow, though they need less initial roasting and may make smaller individual portions. Scoop out any large, spongy seed centre before filling either one.

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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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