3Tbsplimoncello liqueurOR if none is available substitute fresh lemon juice
Instructions
Apple Streusel Filling
Peel & chop apples. In a small bowl, combine apples with remaining filling ingredients & mix well. Set aside. If you prefer, you can cook everything except nuts for 3-4 minutes & then stir in nuts. Cool before adding to cake.
Zucchini-Apple Cake
In a large bowl, beat zucchini, sour cream ( or yogurt), sugar, egg whites, oil, egg & vanilla until well blended. In a small bowl, combine flour, baking powder, baking soda & salt; gradually beat into zucchini mixture until blended.
Preheat oven to 325 F. Spray & flour a bundt cake pan. Spread 1/3 of the batter in pan; spoon 1/2 of filling carefully over cake. Top with another 1/3 of cake batter then remaining filling, finishing with last 1/3 of cake batter.
Bake for about 50 minutes or until a toothpick inserted near center comes out clean. Cool for 5-10 minutes before removing from pan to a wire rack to cool completely.
Limoncello Glaze
In a small dish, mix together powdered sugar & limoncello liqueur. When cake is cool, drizzle slowly over top.