Luscious Berry Cream Pastry

Just looking at this makes my mouth water, it's so yummy.. I think we need to have it on Easter.

1 (18.25 oz) box yellow cake mix
1 stick butter
½ cup coconut
3 cups berries, rinsed and cleaned
2 TBL sugar
½ tsp. cinnamon
1 egg, slightly beaten
1 cup sour cream

Cut together cake mix, butter and coconut. Press into the bottom and half inch up the sides of a 9x13 pan. Bake at 350E for 10 minutes. Remove from oven and arrange fruit over the crust, sprinkle with the cinnamon and sugar. Whisk egg and sour cream together and spread over the top. Bake 15 minutes or until crust is a delicate brown. Cool to warm and cut into squares to serve.