Heat oven to 350. Grease and flour 9 or 10 inch springform pan. In large bowl, mix 2/3 cup sugar and butter; beat til light and fluffy. Add 2 eggs and 2 Tbsp. lemon juice; beat til well blended. in small bowl, mix 2 cups flour, baking powder and salt. Blend well.
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.
Bake at 350 for 55 to 65 minutes or til apples are tender, edges are light golden brown and toothpick inserted in center comes out clean. Cool 10 minutes. Carefully remove sides of pan. In small bowl, blend 1/4 cup powdered sugar and 1 to 2 tsp. lemon juice til smooth. Drizzle over cake. Serve warm or cool.