method
1. Cook the leeks and courgettes in 2.5 cm (1/2 inch) boiling water until just tender, then drain.
2. Melt the margarine in a saucepan, then add the flour and cook for 1 minute.
3. Add the milk, stirring until thick. Bring to the boil, lower the heat and season.
4. Add the leeks, courgettes, butter beans and 60 ml (4 tbsp) of the parsley to the sauce and mix well.
5. Turn the mixture into an ovenproof serving dish.
6. Mix together breadcrumbs, cheese and remaining parsley and sprinkle over evenly.
7. Bake at 200°C (400°f) mark 6 for 30 minutes.
serving amount
serves 4
rate this recipe