In a large saucepan over medium heat, heat applesauce until hot and steamy (do not let boil). As an option, you can microwave for a few minutes until applesauce is very hot to the touch. Add Lime JELL-O to the hot applesauce and stir for 2 minutes to completely dissolve. Slowly add the chilled 7-UP and stir. Some recipes call for adding chopped celery. If you are adding celery, add now.
Pour in a glass serving bowl, cover with plastic wrap, and let sit in refrigerator for 8 hours to overnight to gel up. Final product will bea light set gelatin (not a hard set gelatin).
Prepare Whipped Cream Topping.
About an hour before ready to serve, spoon the Whipped Cream mixture (see instructions below) over lime gelatin until spread evenly all over the Jell-O. Sprinkle with garnishments of your choice. Cover with plastic wrap and keep refrigerated until serving time. Always store gelatin dishes in a covered container to avoid the formation of a thick rubbery skin on the surface.
Makes many servings.
In large bowl, combine cream cheese, marshmallows, and whipping cream, stirring together until marshmallows are submerged. Cover with plastic wrap and set aside in refrigerator until the above Lime Jell-O mixture is set. The topping can also be made right before you are ready to serve JELL-O.
Remove the whipping cream mixture from the refrigerator. With electric mixer on medium speed. beat together the mixture until stiff peaks form. It will is OK for the mixture to be lumpy in appearance because of marshmallows. Do not over whip.
Applesauce 7-Up Jell-O Salad Recipe: https://whatscookingamerica.net/salad/applesauce7up-jellosalad.htm