Given the task definition and input, reply with output. In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

Place sliced strawberries in the baked pie crust.,In a saucepan, combine water, cornstarch, and sugar.,Cook over medium heat; stirring constantly, until mixture comes to a boil, (this should take about 7 minutes) then reduce heat to low, and cook for 2 minutes more, until mixture has thickened.,Add the Jell-O, and stir until gelatin looks dissolved.,Remove pan from heat, and spoon gelatin mixture over strawberries in pie crust.,Chill in the refrigerator until set.,Serve with dollops of the Cool Whip.,______
Note: You can also substitute regular strawberry gelatin for the Wild Strawberry Jell-O Gelatin.