Vegetarian Lasagne

Pre-heat oven to 200C/gas mark 6

Put butter in heavy bottomed pan over low to medium heat. Add flour and stir for a few minutes. Add milk and simmer before stirring. It will form a dense mass. Add another cup of milk and let it simmer but not boil, before stirring into floury mass. then add all milk gradually and nutmeg into cream-like consistency.

Put spinach in colander, pout boiling salted water till it wilts. Drain and pat to dry.

Break up ricotta roughly. Cut mozzarella into slices 0.5cm thick. Lightly drizzle olive oil over the bottom of ovenproof dish. Scatter a third of the spinach, sprinkle marjoram or oregano, add a third of mozzarella and ricotta, spoon bechamel over and then lasagne sheets. Do all the layers, top with bechamel.