Step by step
Layer some fruits of the forest in your oven dish. Sprinkle plenty of sugar over the fruit to contrast with its tartness.
Tips
If you want to make your berry fruit crumble even sweeter and more delicate, you could enrich it with some lovely juicy raspberries, blackberries or blueberries. Another excellent option is the apple crumble, widespread and well-loved in the Anglo-Saxon world.
Trivia
The name of this dessert derives from its characteristic "crumbly" topping.