Name: Onion, walnut & mushroom tarte tatin
Prep time: 20 min
Cook time: 20 min
Yield: 4
Ingredients: 4 onions -; 3 tbsp olive oil -; 200g chestnut mushroom , halved if large -; 2 tsp light muscovado sugar -; 50g walnuts -; 100g blue cheese , such as stilton, or vegetarian blue cheese -; 250g puff pastry , defrost if frozen -

Ingredients for - Onion, walnut & mushroom tarte tatin

1. 4 onions

2. 3 tbsp olive oil

3. 200g chestnut mushroom , halved if large

4. 2 tsp light muscovado sugar

5. 50g walnuts

6. 100g blue cheese , such as stilton, or vegetarian blue cheese

7. 250g puff pastry , defrost if frozen

How to cook deliciously - Onion, walnut & mushroom tarte tatin

1 . Stage

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.

2 . Stage

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.

3 . Stage

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.