Sift flour, soda, baking powder and salt together. cream together sugar and shortening. Beat in well beaten eggs.stir in the vanilla, lemon juice, and banana. Add rolled oats and nuts to flour mixture, alternately with banana mixture, mixing well after each addition. Stir in nuts. Drop by teaspoon onto greased baking sheet and bake in preheated 350 degree oven 15 to 18 minutes, or until golden. Barb