
In a large bowl, combine the drained pineapple, sweetened condensed milk, pecans, and lemon juice. Stir well to combine. Fold in the whipped topping.
Transfer the filling to the graham cracker crust and spread it into an even layer. Refrigerate for at least 4 hours up to 24 hours before serving.
Garnish with more whipped topping, chopped pecans, and Maraschino cherries, if you like.