In a microwave-safe measuring cup, heat water for 45-90 seconds or until boiling. Whisk in Jell-o until dissolved.
In a large bowl, whisk together Jell-o mixture and yogurt. Fold in whipped topping. Carefully spread in crust. Refrigerate at least 4 hours or until set.
Garnish as desired. Store in refrigerator.
Notes
I have never made this recipe using any other kind of Jell-o except for sugar free. I am not sure if it would work with regular Jell-o because the size of the packages are so much different.