Red fruit tart

Ingredients
200g plain flour
1 tsp baking powder
125g butter, softened
210g caster sugar
2 egg yolks
1 1/2 tsp lemon zest, grated
2 egg whites
2 teaspoons cornflour
250g red fruit

Method
1. In a medium bowl, sift together the flour and baking powder. Mix in the butter, 100g caster sugar, egg yolks and lemon zest. Rest for 30 minutes.
2. Preheat oven to 170C. Roll out the dough and place it into a springform tin. Bake in oven for 25 minutes.
3. Beat egg whites until stiff. Gradually stir in the rest of the caster sugar and cornflour – beat for 5 mins. Fold red fruit into the mix, and pour into the tin over the partially baked pastry.
4. Bake in oven for 10 minutes.