1 (19.8 ounce) can sliced pineapple, drained
1 (3 ounce) package instant pineapple pudding mix
1 (8 ounce) can pineapple juice concentrate
6 cups frozen whipped topping, thawed
Combine pineapple, pineapple juice concentrate and pineapple juice concentrate. Pour mixture into pie pan.
Bake in preheated 350 degrees F (175 degrees C) oven for 8 hours. Serve with sliced pineapple and whipped topping.