Blueberry crumble

Mix the blueberries with sugar, lemon zest, and lemon juice in a bowl.

In another bowl, mix the flour, oats, crushed roasted hazelnuts, and brown sugar.

Add the cold butter cubes to the flour mixture and rub them with your fingertips until you get a crumbly texture.

Place the blueberry mixture in a baking dish, then evenly spread the crumble mixture on top

Bake in a preheated oven at medium heat for 15-20 minutes until the top turns golden.

Serve hot with vanilla ice cream.