1/2 c. grated pecans (optional)
1 can blueberry pie filling
1 large can crushed pineapple
1 Duncan Hines cake mix (yellow)
1 1/2 sticks margarine

Spray 9 x 13-inch cake pan. Pour in blueberry pie filling and pineapple with the juice. Pour the cake mix on top of fruit (dry mix). Melt margarine and pour butter on top of dry cake mix. Bake at 350° for 1 hour or until golden brown.