Cream the shortening and sugar.
Beat in eggs, then bananas, sour cream and lemon juice.
Sift together flour, baking powder, salt and baking soda.
Add to mixture, stirring just to dampen flour.
Fold in nuts.
Pour into greased and floured 9x5x3-inch pan.
Bake at 350 degrees F for 50 to 60 minutes. Cool in pan for 10 min.
Remove and finish cooling on rack.