This is from "Duncan Hines" Bake Shop in a Book. Hope this helps.

1 package Duncan Hines Wild Blueberry Muffin Mix
1 can (21 ounce) fruit pie filling (cherry, peach, apple, or blueberry)
1/4 cup (1/2 stick) butter or margarine melted
1/4 cup chopped nuts

Preheat oven to 350 degrees. Rinse blueberries and set aside to drain. Pour fruit pie filling in an ungreased 8 or 9 inch square baking pan. Gently fold in drained blueberries, set aside. Combine muffin mix, nuts, oleo or butter until crumbly. Sprinkle over pie filling and bake for 30 to 40 minutes or until golden brown. Serve with icecream or whipped cream if desired.