This is one of the very very easy dessert and you can actually do different experiments by using different flavors of yogurt and various flavors of Jello. I used strawberry flavor for both.
All you need is:
Readymade Graham cracker pie crust
1/2 L cool whip
300 g yogurt Strawberry flavor (any flavor)
Jello small strawberry flavor (the one which makes 4 servings)
1 cup water
Boil 1cup water and add Jello powder. Stir until Jello is properly mixed. Take a big bowl. Add cool whip, Jello and yogurt and mix them well. Pour the mixture on Graham cracker ready pie crust and put it in a refrigerator to set. Serve chilled. It will be ready to serve in 2 hours.