My mom used to make this for my brother, dad and I...many, many years ago. She didn't always add the pecans and would sometimes use walnuts instead of pecans.
1 can (20 ounces) crushed pineapple with juice, undrained
1 can (21 ounces) cherry pie filling
1 package yellow cake mix
1 cups chopped pecans
½ cup butter
Preheat oven to 350 degrees. Grease 13x9 inch pan.
In pan, add pineapple with juice and spread evenly in the pan. Next add in the pie filling and spread evenly. Sprinkle cake mix evenly over cherry layer. Dot the top of the mixture with butter. Sprinkle chopped pecans on top (before baking or after baking).
Bake about 50 minutes in a 350 degree oven.