This makes a substantial main course that’s full of flavour and it can be prepared up to the baking stage a day in advance. If you want to serve this as a glamorous starter make individual tarts in Yorkshire pudding tins.
Ingredients
Method
Heat oven to 200C/180C fan/gas 6. Peel the onions and cut each into 6 wedges through the root. Heat the oil in a large pan, add onions, then gently fry for 20 mins until softened and lightly coloured.
Add the mushrooms, sugar, salt and pepper and give it a good stir. gently cook, stirring now and then for a further 5 mins. stir in the walnuts. line the base of a 20-23cm sandwich cake tin (not loose-based) with baking parchment. spoon over the onion mixture and press it down lightly. Crumble the cheese over.
Roll out the pastry and trim to a round, about 5cm larger than the tin. Put the pastry over the filling and tuck in the ends. Bake for 35-40 mins until the pastry is crisp and golden. Cool for 5 mins in the tin, then turn out onto a flat plate and cut into wedges. serve with a green salad.