1. Mix all ingredients in a large bowl and combine. Use fork to mix in butter well.
2. Sprinkle topping over the berry mixture, covering completely. Bake for 35-40 minutes until bubbly. (If you've filled it to the brim, place your baking dishes on a baking sheet to avoid spillage in your oven)
3. Let cool for 10 minutes and serve with whipped coconut milk.