Step 1

Preheat oven to 350°F. Coat a 9×13 baking dish with nonstick spray, set aside.

Step 2

In a large bowl mix together the oats, flour, sugar, and salt. Mix in the butter with your hands or a pastry cutter until mixture form crumbs when squeezed together.

Step 3

Place berries in another large bowl. Stir in the sugar, juice, and vanilla into the berries. Sprinkle the flour on top of the berries and toss to coat.

Step 4

Place the berry mixture into the prepared pan, and sprinkle with the oat mixture evenly.

Step 5

Bake for 45 minutes, until the top is golden and the berries are bubbly.