4. Fold in the whipped topping gently until the mixture is light and fluffy.
5. Pour the filling into the prepared graham cracker crust, smoothing out the top with a spatula.
6. Refrigerate the pie for at least 4 hours, or until it is firm and set.
7. Garnish with additional lemon zest or whipped topping before serving if desired.
For a little twist, you can try using different citrus concentrates like lime or orange for a new flavor profile. To make it slightly healthier, consider using a low-fat cream cheese or a sugar-free sweetened condensed milk. For those who prefer a crunchier base, swapping the graham cracker crust with a nut-based crust such as almond or pecan can add a whole new dimension to the dessert.