Sweet Potato Bread

1/4 cup shortening
1/4 cup brown sugar, firmly packed
2 eggs, well beaten
1 1/4 cups mashed cooked sweet potatoes
2 Tbsp. milk
1 tsp. lemon juice
2 cups sifted flour
4 tsp. baking powder
1/2 tsp. salt
1 cup chopped nuts
1/4 cup orange marmalade
3 unpeeled orange slices

Cream shortening; add sugar and beat until light and fluffy. Add eggs, sweet potatoes, milk and lemon juice; beat well. Sift together flour, baking powder and salt. Add sifted ingredients and nuts to sweet potato mixture and mix only until ingredients are combined. Spread orange marmalade over bottom of greased loaf pan. Arrange orange slices on marmalade. Turn sweet potato batter into pan and bake at 350 degrees for 1 1/2 hours. Remove from pan and cool before slicing.