Preheat oven to 350°F. Gather all ingredients.
Whisk together sugar, vanilla, salt, and eggs in a large bowl. Place graham crackers in a large zip-top bag; crush graham crackers with a rolling pin, rolling over bag until crumbs resemble panko. Stir crushed graham crackers, pecans, and coconut into egg mixture (mixture will be thick).
Roll pie crust into an 11- to 12-inch circle. Fit dough into a 9-inch deep-dish pie plate; fold edges under and flute. Pour filling into unbaked pie crust. Bake at 350°F until filling is crisp and browned on top and center of pie still jiggles, about 35 minutes. Serve pie warm, at room temperature, or chilled. Garnish with whipped cream and banana slices, if desired.
