Berry Crisp

1 1/2 cups blackberries
1 1/2 cups raspberries
1 1/2 cups blueberries
(frozen blend from coscto works well)
4 TB sugar
2 cups all purpose flour
2 cups rolled oats
1 1/2 cups brown sugar
1 tsp cinnamon
1/2 tsp nutmeg
1 1/2 cups butter
Preheat oven to 350. In a large bowl, gently toss (thawed or at least slightly thawed) fruit with the sugar; set aside. In a separate bowl combine flour, oats, brown sugar, cinnamon and nutmeg. Cut in butter until crumbly. Press half the mixture in the bottom of a 9X13 pan. Cover with the berries. Sprinkle remaining crumble mixture on top. Bake for 30-40 minutes until fruit bubbles and top is golden.

Now I have ton confess that I haven't actually made or eaten this. But my friend just emailed it to me today, and I thought this would be a perfect 4th of July dessert. When I think of these ingredients together, I know it would taste so wonderful-can't you nearly taste it already?
It's very close to my apple crisp, so I know these ingredients have to be winners together.
Happy 4th!