Easy Key Lime Pie

1 9 inch prepared graham cracker crust

3 cups sweetened condensed milk

1/2 cup sour cream

3/4 cup key lime juice

1 tablespoon grated lime zest

Preheat oven to 350 degrees.  Mix all the ingredients (really well) and pour into pie crust.  Bake 5-8 minutes or until tiny bubbles burst on the surface.  DO NOT BROWN.  Chill pie thoroughly.  Serve with whipped cream and garnish with lime slices.  I cooked my pie about 12 minutes but watch yours closely, because you don't want it to brown. Serves 8.