Onion and Gruyère tart

Serves: 8
Preparation time: 30 minutes plus chilling time
Cooking time: 50 minutes

Onion gruyere tartIngredients:

225g (8oz) plain flour, plus extra for dusting
125g (4½oz) butter, cubed
30g (1¼oz) Parmesan cheese
1 medium egg, beaten

For the filling

a knob of butter
1 tbsp olive oil
500g (1lb 2oz) onions, thinly sliced
4 large eggs
300ml (10fl oz) double cream
150ml (5fl oz) milk
200g (7oz) Gruyère cheese, grated
30g (1¼oz) Parmesan cheese, grated
salt and black pepper

Method:

1 Line a 24-25cm (9½-10 in) deep round loose-bottom tart tin.

2 To make the pastry, put the flour, butter and Parmesan in a food processor. Whizz until it looks like breadcrumbs. Add the egg and 1 tablespoon of water and whizz until the mixture forms a ball. Roll out on a clean, lightly floured work surface and line the base and sides of the flan tin with the pastry. Set aside to chill in the fridge for 30-35 minutes.

3 Preheat the oven to 220°C/R7. Prick the base of the flan pastry and line with baking paper and then baking beans. Blind bake the pastry for 10 minutes. Remove the beans and bake for a further 8-10 minutes until lightly golden, then place the pastry case on a baking sheet.

4 To make the filling, melt the butter and olive oil in a frying pan. Add the onions and fry over a medium-high heat for 5 minutes. Cover with a lid and gently simmer for 20 minutes until soft and golden brown. Spread on to the base of the tart.

5 Beat the eggs in a bowl. Add the cream and milk and season. Add the Gruyère, then pour into the case. Sprinkle with the Parmesan.

6 Reduce the oven to 180°C/R4. Bake for about 30-35 minutes until lightly golden on top and set in the middle.

Recipe and image courtesy of Annabel Karmel’s Family Cookbook (Ebury Press), which is filled with cooking inspiration for the whole family and available to buy from 13 March. Visit www.annabelkarmel.com

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