1 sm. box Jello (any flavor)
2 ripe bananas
1 sm. can pineapple (save juice)
8 lg. diced marshmallows
2/3 c. Cool Whip
1/2 c. pineapple juice
2 tsp. flour
1/2 c. sugar
1/2 c. water
1 tsp. butter
1 egg

Prepare Jello on package. Add bananas, marshmallows and pineapple. Set in refrigerator to set.

Heat pineapple juice and water. Add flour, egg, sugar and butter; bring to a boil, stirring constantly. Set aside to cool. Mix in Cool Whip. Cool in refrigerator, then pour mixture over Jello. Chill at least 2-3 hours before serving.