Sweet, softened leeks, tender courgettes and a golden cheddar topping make this leek and courgette recipe a simple addition to dinner. There is no separate sauce to prepare: a little olive oil helps the vegetables soften, while the cheese adds a savoury finish.
The most useful step happens before the dish goes into the oven. Cooking the vegetables briefly in a frying pan gives the leeks time to soften and allows some of the courgettes’ moisture to evaporate. This helps prevent a watery bake with undercooked pieces of leek hiding beneath the cheese.
Serve it alongside roast chicken, fish or beans, or add crusty bread for a light lunch.
Recipe at a Glance
- Serves: 4 as a side dish
- Preparation time: approximately 15 minutes
- Hob cooking time: approximately 15–20 minutes
- Baking time: 15–20 minutes
- Resting time: 5 minutes
- Equipment: a large frying pan, a shallow baking dish approximately 20 × 20 cm, a chopping board, knife and grater
Cooking times are estimates. Use the texture of the vegetables and the appearance of the topping to guide you.
Ingredients
- 1 large leek, approximately 200 g after trimming, using the white and light green parts
- 2 medium courgettes, approximately 450–500 g in total
- 1 tablespoon olive oil, plus a little extra for greasing
- 100 g mature cheddar, grated
- ¼ teaspoon fine salt, or less to taste
- ¼ teaspoon freshly ground black pepper
- ½ teaspoon dried thyme, optional
Courgettes are also called zucchini. Choose firm ones with unbroken skins; there is no need to peel them.
Mature cheddar gives the topping a noticeable flavour without requiring a thick layer of cheese. If you are preparing the dish for vegetarians, check that your cheese is made with vegetarian rennet.
How to Make This Leek and Courgette Recipe
1. Heat the oven and prepare the dish
Preheat the oven to 200°C conventional / 180°C fan / 400°F / Gas 6.
Lightly grease your baking dish. A shallow dish allows the vegetables to spread out rather than forming a deep, tightly packed layer.
2. Clean and slice the leek
Trim away the root end and the tough, dark green leaves. Cut the remaining leek in half lengthways.
Rinse under running water, gently opening the layers to remove trapped soil. Drain well, then slice across into half-moons approximately 5 mm thick.
Check between the outer layers carefully: grit can remain there even when the outside looks clean.
3. Slice the courgettes
Wash and dry the courgettes, then trim off the ends.
Slice into rounds approximately 5 mm thick. If they are particularly wide, cut them lengthways first and make half-moons instead.
Aim for roughly even pieces so they soften at a similar rate.
4. Soften the leek
Heat the olive oil in a large frying pan over a medium-low heat. Add the sliced leek and cook for 6–8 minutes, stirring regularly.
The leek should soften and begin to look slightly translucent without developing dark brown edges. If it starts catching, lower the heat and add a tablespoon of water. Let that water evaporate before moving to the next step.
5. Add the courgettes
Add the courgettes, salt, pepper and optional thyme. Increase the heat to medium and cook uncovered for approximately 8–12 minutes, stirring occasionally.
The courgettes should begin to soften but still hold their shape. Before transferring the vegetables, check that there is no substantial puddle of liquid in the bottom of the pan.
If the pan is crowded and the vegetables are sitting in water, give them a little longer, stirring so the moisture can evaporate. A wide pan makes this easier.
Taste a cooled piece and adjust the seasoning if needed, remembering that the cheddar will add saltiness.
6. Add the cheese and bake
Transfer the vegetables to the prepared baking dish and spread them into an even layer. Sprinkle the grated cheddar evenly over the top.
Bake uncovered for 15–20 minutes, until the vegetables are tender and the cheese has melted with scattered golden patches.
Test a piece of courgette near the centre with a small knife: it should pierce easily. The leek should be soft rather than chewy.
If the topping browns before the vegetables are ready, loosely cover the dish with foil and continue baking, checking every few minutes.
7. Rest briefly and serve
Leave the bake to stand for 5 minutes before serving.
Expect tender vegetables beneath melted cheese, with a little natural moisture at the bottom. This is a spoonable vegetable side dish rather than a firm casserole that cuts into neat squares.
Small Details That Make a Difference
Cook off excess moisture before baking. Courgettes release water as they cook. The uncovered frying-pan stage helps reduce it; cheese alone will not thicken that liquid into a sauce.
Avoid overfilling the dish. If you double the ingredients, use a larger baking dish and cook the vegetables in batches. A deep layer can retain more moisture and take longer to heat through.
Let the leek soften gently. Increasing the heat too quickly can brown its edges while leaving the thicker pieces firm.
Judge the topping realistically. Cheddar melts and develops golden patches, but it does not create a breadcrumb-style crunchy crust.
Easy Variations
For a little garlic flavour, add one finely chopped garlic clove during the final minute of cooking the leek, then continue with the courgettes.
For a crisper topping, mix 2 tablespoons of dried breadcrumbs with 1 teaspoon of olive oil and scatter over the cheese before baking. Watch towards the end, as breadcrumbs can brown more quickly than the cheese.
You can also replace the thyme with a small handful of chopped fresh parsley, added after baking for a fresh finish.
What to Serve With It
This bake works as a vegetable side alongside roast chicken, baked fish or pork chops. For a meat-free meal, serve it with white beans or lentils and some bread.
Because the topping is rich and savoury, a simple green salad with a sharp dressing makes a useful accompaniment.
Storing and Reheating Leftovers
Transfer leftovers to shallow containers and refrigerate within 2 hours, or within 1 hour if the surrounding temperature is above 32°C / 90°F. Keep the fridge at 4°C / 40°F or below and use refrigerated leftovers within 3–4 days.
Reheat only the portion you need, in a microwave-safe container or an ovenproof dish, until the centre reaches 74°C / 165°F. In the microwave, rotate or stir the portion where practical to help it heat evenly.
The courgettes may soften further and release more moisture after storage.
These storage and reheating instructions follow the USDA’s guidance on leftovers and food safety.
A Final Thought from Adam
I am more comfortable with straightforward recipes than elaborate kitchen projects. A short ingredient list and clear instructions make cooking feel more approachable, especially when you are still building confidence.
That is the idea behind this leek and courgette recipe: familiar ingredients, a manageable sequence of steps and a few useful signs to watch for along the way. The slices do not need to look perfect, and the cheese does not need to brown evenly across every corner. What matters is giving the vegetables enough time to soften.
If you are less familiar with the kitchen too, take it one step at a time. There is plenty of room at the table for simple food.
Recipe development note: This recipe was developed with AI assistance and has not been independently kitchen-tested for this article. Cooking times and yields are estimates; use the texture and doneness checks described above.
