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 3-4 tablespoons batter into pan; tilt to spread batter to cover 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 filling; fold in half or roll up. Top with 1 tablespoon sour cream and sprinkle with cinnamon sugar mixture.
Nutritional information per serving: 145 calories; 4 g protein; 26 g carbohydrates; 3 g fat (20% calories from fat); 1.7 g saturated fat (11% calories from saturated fat); 39 mg cholesterol; 80 mg sodium; 1.7 g fiber.