Step 1

In a small saucepan, combine beaten eggs, sugar, and juice of 1 lemon. Stir the mixture constantly over medium heat until boiling; adjust to medium-low heat and continue whisking until mixture has thickened. Remove from the heat, and stir in butter. Cool completely.

Step 2

In a chilled mixing bowl, beat whipped cream until stiff peaks form. Once the egg-sugar mixture has cooled, fold into whipped cream and set aside.

Step 3

In a large bowl, add halved grapes, pineapple chunks, orange segments, halved cherries, and bananas. Stir fruit together until combined. Add mini marshmallows, and mix until incorporated. Toss fruit salad with whipped cream-egg mixture, stirring to coat the fruit evenly and completely.

Step 4

Cover the bowl with plastic wrap. Chill in the refrigerator overnight (at least 6 hours) to let the flavors marry. Serve cold.