2 (3 oz.) or 1 (6 oz.) pkg. lemon Jello
1 can (13 1/4 oz.) crushed pineapple
2 bananas
1/2 c. miniature marshmallows
1/2 c. sugar
2 tbsp. cornstarch
1 egg
1 pkg. Dream Whip

Dissolve Jello in 2 cups hot water; and add 2 cups cool water, then pour into 9 x 10 inch baking dish. Drain pineapple and save juice. Add pineapple, bananas and marshmallows to Jello and let set. Make sauce. Add water to pineapple juice to make 1 cup juice. Pour juice into sauce pan and add sugar, cornstarch and egg. Cook until mixture thickens and boils, then cool. Make Dream Whip as directed on the box. When sauce is cool pour into Dream Whip and fold in. Pour sauce on top of Jello. Refrigerate until served.