In blender, combine milk, egg and salt; add flour and butter. Blend at high speed 1 minute.

To make filling, combine grapes, oranges, sugar, liqueur or juice, and orange peel; set aside.

Heat lightly buttered 7-inch skillet or crepe pan over medium-high heat. Pour 3 to 4 tablespoons of batter into pan; tilt to spread batter to cover entire bottom of pan. Cook over medium-high heat about 1 minute or until batter is set. Turn crepe and cook about 30 seconds or until lightly browned.

Fill each crepe with 1/2 cup of grape filling; fold in half or roll up. Top with 1 tablespoon sour cream, and sprinkle with cinnamon sugar.