I can give you a couple of ideas:
The first is my version of Dear Abby's Summer Surprise Dessert:
Take 6-8 cups cut fresh fruit (any combination of plums, nectarines, peaches, grapes (cut in half if they are large), blueberries, strawberries, bananas, kiwi, melon will work). Canned pineapple can be used, but any other fruit must be fresh. Put the fruit in a 9X13 pan or dish (or larger, if you have one).
Top with 2 cups sour cream (I just drop it in spoonfuls all over the top of the fruit). Then sprinkle a cup of brown sugar over the sour cream.
Cover the pan and leave it in the refrigerator overnight. Just before serving, stir it all together (the dressing will be a bit lumpy at first, but eventually will smooth out). The dressing combines with the fruit juices and makes a delicious sauce. I usually serve this as a dessert, but you could serve it as a salad too.
Another idea is to have cut up fresh fruit, and make a dip using extra creamy whipped topping combined with creme de menthe. (But if you don't want to use the liqueur, you can use mint extract and a drop or two of green food coloring). Mix it up, and if you think it needs it, add a little confectioner's sugar. You could serve the fruit on a platter with a cup or bowl of the dip in the middle, like they do with fresh vegetable platters.