Here’s one I have no idea where it came from. 
2 packages jello (4 serving size), strawberry
5 c boiling water
2/3 c sour cream or plain vanilla yogurt
2 packages jello ( 4 serving size) lime
Dissolve the strawberry jello in 2 1/2 c boiling water.
Pour 1 1/2 c of this into a jello mold or large dish.
Chill till set but not firm.
Chill the rest of the strawberry jello in a bowl until it is just slightly thickened.
Then blend in 1/3 cup of the sour cream.
Spoon over the jello in the mold.
Repeat with the lime jello.
Chill completed salad at least 2 hours
