Ingredients

• 1 1/2 cups flour
• 1 cup sugar
• 1/4 cup applesauce
• 1/4 cup margarine
• 1/3 cup milk
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 teaspoon lemon juice
• finely chopped walnuts, if desired
• 2 tablespoons margarine
• 2 cups powdered sugar
• 1/4 teaspoon salt
• 1 egg
• 1 very ripe banana
• 1 teaspoon vanilla