Wash and hull the strawberries. Place them upside down in the baked (and cooled) pie shell and set aside.
In a liquid measuring cup or small bowl, pour in water, cornstarch, and sugar. Stir until mostly dissolved. Microwave for 1 to 2 minutes until the mixture bubbles up and thickens. It should turn translucent.
Stir the strawberry JELL-O gelatin powder into the sugar water mixture and pour over the strawberries. Cover and refrigerate until set, about 2 to 3 hours.
In a large bowl, using a hand mixer or stand mixer, whip the heavy cream, sugar, and vanilla extract together until stiff peaks form.
Spread the whipped cream over the top of the pie and garnish with more fresh strawberries. Serve cold.