Start with your graham cracker crust – whether store-bought (for ultimate convenience) or homemade (for that extra personal touch). If using homemade, press it firmly into your pie dish and refrigerate while preparing the filling.
In a large mixing bowl, combine the sweetened condensed milk and lemon juice. Stir until well blended – you'll notice it begins to thicken slightly as the acid reacts with the condensed milk.
Fold in the well-drained crushed pineapple, flaked coconut, and chopped pecans. Pro tip: For extra flavor depth, toast your pecans and coconut before adding them.
Gently fold in the whipped topping or homemade whipped cream. Use a rubber spatula and employ a light hand with a figure-eight motion to maintain maximum airiness.
Spoon the mixture into your prepared crust, creating decorative swirls on top if desired.
Cover lightly with plastic wrap and refrigerate for at least 4 hours, though overnight is preferable for the flavors to fully meld.
Just before serving, add a final touch of luxury with additional chopped pecans and maraschino cherries arranged decoratively on top.
Slice with a sharp knife dipped in warm water for the cleanest cuts and serve chilled.