Blueberry Coffee Cake

Preheat oven to 350. Prepare a 13"x9" pan with cooking spray; set aside. To prepare batter, combine flour, 1 1/3 cups sugar, and salt in a mixing bowl. With a pastry cutter, add margarine until crumbly. Reserve one cup mixture. Add 3/4 cup milk, two eggs, baking powder, and one teaspoon vanilla extract. Mix well. Spread into prepared pan. Sprinkle blueberries over evenly over top. In another mixing bowl, combine cottage cheese, remaining egg, two tablespoons sugar, and lemon peel. Mix well. Spoon cheese mixture over berries; spreading carefully over entire blueberries. In a small bowl, combine reserved crumb mixture, walnuts, brown sugar, and cinnamon. Sprinkle over cake. Bake for 45 minutes or until toothpick inserted in center comes out clean. Meanwhile, to prepare icing, combine powdered sugar, remaining milk, and remaining vanilla extract until drizzling consistency. Drizzle over cooled cake.