Cream a half cup butter with about a cup and a half of powdered sugar, creaming well.
Add two eggs, one at a time, beating three minutes with the medium speed of your mixture after each addition.
Blend in one T of lemon juice.
Reserve twelve slices of banana for garnish.
Fold one square (1 ounce) of ujnsweeetened chocolate, grated and the bananas into the sugar/egg mixture.
Turn this filling into a cooled, baked pie shell.
Garnish with 1/4 c chopped walnuts and the banana slices.
Chill for two to three hours. This pie is best best when served on the same day it was made.