How to cook
Add the vanilla and stir. While this mixture is cooking, pour the flour and butter in a bowl.
Stir until you get crumbs, add the chopped walnuts. Knead the crumbs and add the other tablespoon of sugar.
Pour the fruit mixture into a baking dish, sprinkle with the crumbs and bake in a moderate oven for 25 min. Serve with ice cream.