1kg/2lb 3oz pumpkin, peeled, seeds removed, cubed
250g/8戮oz green lasagne pasta sheets
55g/2oz plain flour
salt and freshly ground black pepper
freshly grated nutmeg, to taste
90ml/3fl oz extra virgin olive oil
paprika, to taste
55g/2oz butter
150ml/5录fl oz milk
350ml/10陆fl oz milk
25g/1oz grated parmesan cheese, or vegetarian parmesan-style grating cheese
250g/9oz fresh ricotta cheese