Step 1

In a food processor or blender, add the dry ingredients, except for butter. Grind for 3 minutes until it resembles flour. Now add the butter and pulse a few times, until incorporated but small amounts of butter still remain. Transfer to a medium bowl with lid. Keep in fridge.

Step 2

In a large measuring cup, mix the milk and vanilla. Keep in fridge.

Step 3

In a medium lightly-greased baking dish, mix together berries, cornstarch, and maple syrup. Add water if you want it more syrupy. Keep in fridge.

Step 4

In the morning, take out the oat mixture, berries, and milk. Give the milk mixture another stir and add to the oats, mixing until combined. Place batter back in the fridge and let rest for 10-15 minutes while preheating the oven to 375℉.

Step 5

Take out batter and spoon evenly over the berries. Bake for 30-35 minutes until golden and firm on top.

Step 6

Let cool 5-10 minutes. Serve with yogurt.