How to Make It
Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the oats, flour, brown sugar, and melted butter.
Stir in the vanilla extract until everything is mixed well.
Spread the mixed berries evenly in a baking dish.
Pour the oat mixture over the berries, covering them well.
Bake for 25-30 minutes until golden and bubbling.
Serve
This dessert is best served warm, spooned right out of the dish. The juicy berries and sweet crumble make for a delightful pairing!