Preheat oven to 350°F. Grease loaf pan.
In small bowl, cover apple dices with apple juice. Allow to soak for 15 minutes. Drain well before using.
Cream butter and sugars; beat in eggs. Stir in sour cream, banana
and vanilla. In a separate bowl, combine flour, baking powder, baking
soda and cinnamon. Gradually add to butter mixture. Gently stir in
apples and nuts. Spoon into prepared loaf pan and bake one hour.
Cool on wire rack 10 minutes; remove from pan and continue cooling.