As "They" say, there is always room for Jello.
My Mother-in-Law almost always has jello prepared; I believe one could drop in, unannounced, and she would be able to serve a lunch at the drop of a hat that would be inevitably followed by some sort of Jello. One that is my favorite is made with pie filling, and ends up more like a dessert than a fruit salad, so I hesitate to call it such.
2 packages of cherry Jello
2 cans of cherry pie filling
1 tub of Cool Whip or the equivalent of real whipped cream
Prepare the jello according to the directions on the box, using the speed-set method (with ice-cubes). Remove any remaining ice, and thoroughly stir in pie filling. Pour into a 9x13 glass baking dish & refrigerate for at least 1 hour, or until fully set-up. Top with Cool Whip & serve or refrigerate until you are ready to.
This one is very easy & can be made a day ahead of time if you are serving a crowd or have a potluck to go to!