Preheat oven to 350°F. Line a 4 1/2-by 8 1/2-by-2-inch loaf pan with heavy duty foil. In a large bowl, sir together the nut bread mix, sweet potatoes, walnuts, apple juice, oil, egg, brown sugar, cinnamon and ground cloves. Mix well. Stir in maple syrup; mix well.
Spoon into loaf pan.
Bake for 50 to 60 minutes or until a toothpick inserted in the center comes out clean. Put loaf pan on wire rack to cool; about 25 minutes. Serve with jam or butter.