Sour Cream Apple Pie
["1 frozen, unbaked and reduced fat pie crust", "4 apples, peeled and thinly sliced", "8 oz. fat-free sour cream", "3 egg substitutes (about 4 oz.) or 3 egg whites", "1/4 c. applesauce", "1/2 c. brown sugar", "2 tsp. vanilla extract", "1/2 tsp. salt", "2 tsp. cinnamon", "2 tsp. lemon zest", "1/2 c. flour"]
["Preheat oven to 400\u00b0. Prick pie crust several times with a fork. Arrange apples in pie crust. In bowl, combine next 9 ingredients. Spread mixture over apples. In bowl, combine all topping ingredients. Pour over the top of pie. Bake 1 hour."]
["frozen", "apples", "sour cream", "egg", "applesauce", "brown sugar", "vanilla extract", "salt", "cinnamon", "lemon zest", "flour"]