Preparation
- 1
Pre-heat your oven to 190°C (375°F) using the top and bottom heat setting without the fan.
- 2
Combine the 50 g butter, 50 g white sugar, 100 g flour, and 1 pack vanilla sugar in a bowl.
- 3
Mix these ingredients with your hands until crumbles form.
- 4
Place the crumble mixture into the fridge until needed.
- 5
Zest the orange and the lemon.
- 6
Cook and blend 500 g of the frozen blueberries into a smooth puree.
- 7
Toss the remaining 500 g frozen blueberries with 1 tablespoon of the flour in a separate bowl.