Preheat oven to 450 degrees F. Place the frozen pie crust onto a cookie sheet, which will make it easier to remove from the oven. Prick holes all over the pie crust bottom and sides with a fork. Bake for 10-12 minutes or until light golden brown.

In a medium saucepan, whisk together the gelatin, sugar, and cornstarch until combined. Add in the water and lemon zest, whisking to combine. Bring to a boil over medium-high heat and cook for one minute exactly, stirring constantly. Take off the heat and bring the mixture to room temperature.

Place all the berries into the pie crust shell. Pour the glaze evenly over the berries. Refrigerate until firm, about 2-3 hours. Serve with freshly whipped cream or whipped topping.