1 banana
1 (9 inch) pie shell, baked & cooled
2 (4 serving size) pkgs. Jello vanilla or banana cream flavor instant pudding
2 1/2 c. cold milk
2 c. Cool Whip

Slice banana into pie shell. Prepare pie filling mix as directed on package for pie, using 2 1/2 cups milk. Fold in 1/2 cup of the whipped topping and pour over banana in shell. Chill at least 3 hours. Top with remaining whipped topping; garnish with banana slices if desired.