Add to egg mixture. Beat at low speed til well blended. spread in prepared pan. Spoon preserves over batter.Carefully spread to cover. Top with apple slices; slightly press into batter. In medium bowl, mix all topping ingredients: ground almonds, 1/2 cup sugar, 1/2 cup sour cream, 2 eggs, beaten, 2 Tbsp. flour and 1 tsp. grated lemon peel. Blend well. Pour over apples.