Frosted Pineapple Salad (7-Up Salad)

2 Packages (3 Oz) Lemon Jell-O
2 Cups 7-Up
1 Can Pineapple Tidbits
2 Cups Boiling Water
2 Bananas
1 Cup Miniature Marshmallows

Dissolve Jell-O in boiling water. Add 7-Up and chill until slightly thickened. Add drained pineapple, sliced bananas, and marshamllows. Pour into a 9x13 pan. Chill until set.

Topping:
1/2 Cup Sugar
1 1/2 Teaspoon Cornstarch
1 Beaten Egg
1 Cup Pineapple Juice

Boil until thickened and cool. Add 1 cup Cool Whip to cooled mixture. Spread on set salad.