1 can undrained crushed pineapple
1 can cherry pie filling
1 cake mix (yellow or white; dry)
1 1/2 c. chopped nuts (optional)
1 c. butter, melted

Grease a 9 x 13 cake pan. Dump pineapple. Add cherry pie filling. Spread dry cake mix over pineapple and pie filling. Pour melted butter over cake mix. Sprinkle nuts over top. Do not stir.

Bake at 350°F for 1 hour.