Preheat oven to 180C/160C fan/gas
Heat oil and butter in your largest frying pan and fry off diced courgette, onion and garlic and season to taste.
Add the grated courgettes, and turn up the heat. Cook until softened. Stir in the orzo and wine, if using, for a minute, then turn off the heat and stir in the stock, most of the Parmesan
Transfer to a baking dish. Bake for 15 mins, take out of the oven and scatter with breadcrumbs and the remaining Parmesan and bake for 10 mins more. Eat immediately.