Sourdough Banana Bread

1/3 cup shortening [salted butter]
1 cup sugar
1 egg
2 cups all-purpose flour
1 tsp baking powder
1/2 tsp baking soda
1 tsp salt [omitted]
1 cup mashed banana [2 bananas]
1 cup sourdough starter
3/4 cup chopped walnuts [omitted]
1 tsp vanilla or 1 tsp grated orange rind [vanilla, but orange rind would probably be good]

Cream together the shortening and sugar, add egg, and mix until blended. Stir in bananas and sourdough starter. Add orange rind or vanilla. Sift flour, measure again with salt, baking powder, and soda. Add flour mixture and walnuts to the first mixture, stirring just until blended. Pour into greased 9x5" loaf pan. Bake in moderate or 350 degree oven for 1 hour or until toothpick comes out clean. Cool before slicing.