Tuna, leek and courgette lasagne – serves 4
For the white sauce:
- Preheat the oven to gas mark 5/ 190°C
- Heat the oil in a frying pan and then add the onion, garlic and leeks and cook until softened (around 5 minutes)
- Stir n the tomatoes, puree, courgettes and basil
- Bring to the boil, cover and simmer for 15 minutes.
- Whilst this is cooking start preparing the white sauce
- Melt the butter in a saucepan and add the flour, cook together stirring for one minute.
- Add the milk gradually, whisking continuously until the sauce thickens.
- Remove the pan from the heat and stir in the mustard and season
- Mix the tuna into the tomato sauce made earlier.
- Spoon half of this mixture into a shallow, ovenproof dish, then top with half of the lasagne sheets
- Spread half the white sauce over and sprinkle half of the cheese.
- Repeat these layers ending with a sprinkling of cheese.
- Bake in the oven for 35 minutes until top is golden a bubbling.