For preparing apple crumble, cook the apple cubes in lemon juice, 50 grams sugar and 100 ml of water for 15 minutes covered on low flame. Keep it aside.
Mix maida, baking powder, butter, 1 tbsp of cold water and remaining sugar. Mix to get a grainy mixture.
Preheat the oven at 220 degrees Celsius.
Pour the apple juice mixture into an oven dish.
Arrange raspberries on top of it, then spread the grainy mixture over it.