Banana Split Pie

1/2 cup butter or margarine
1 1/2 cups confectioners sugar
2 eggs
1 teaspoon vanilla extract
2 bananas
1 tablespoon lemon juice
1 (1 ounce) square baking chocolate, grated
1 - 9 inch baked pie shell
walnuts
1 banana, sliced
whipped cream
                   
1. Cream together butter and confectioner's sugar. Beat in
   eggs one at a time; beat for 3 mins after each addition.
   Stir in vanilla. 
2. Slice 2 bananas, and sprinkle with lemon juice. Fold
   grated chocolate and bananas into sugar mixture. Turn
   filling into cooled pie shell. Garnish with walnuts, banana
   slices, and whipped cream.