Cream shortening and sugar until fluffy. Add eggs, one at a time, beating well after each addition. Stir in banana and vanilla. Sift dry ingredients together and add to banana mixture. Mix well. Pour into greased loaf pan or 9 inchx9 inchx2 inch pan. Bake at 350�F for 30 to 35 minutes. Note: half cup chopped nuts can be added if desired.