This recipe can be doubled up and prepared in advance or frozen in individual portions. If you have trouble getting your children to eat vegetables, cut them into smaller dice and they often won’t know they are there. You could use most vegetables that need using up from the fridge such as broccoli, carrot, butternut squash, cabbage, cauliflower, marrow, leeks, babycorn, sweetcorn, peas… the list goes on.
Preheat the oven 180°C (350°F) mark 4. Grease a deep ovenproof dish, or individual dishes with a little oil.
In a frying pan cook the onions, courgettes, peppers, butternut squash, leeks (if using) and garlic in the remaining oil for a few minutes, then add the tomatoes, tomato puree, seasoning and water or stock. Bubble for 10-15 minutes.
To make the sauce, place butter, flour, milk and mustard in a small saucepan and whisk continuously over a medium heat until the sauce begins to boil and thicken. Turn down the heat to its lowest and let the sauce cook for 2 minutes. Add the grated cheese.
Into the baking dish pour one quarter of the white sauce, followed by one third of the vegetable mixture. Sprinkle in a third of the cheese and follow this with a single layer of lasagne sheets. Repeat this process, ending up with a final layer of sauce and a good sprinkling of cheese and the pumpkin seeds for added crunch.
Cook in the oven for 25-30 minutes or until golden and bubbling.