Core apples, and cut each into 1/2-inch-thick rings.
Stir together apple juice and next 3 ingredients.
Melt butter in a large nonstick skillet over medium-high heat; cook apple rings, in batches, until browned on both sides. Return all apple rings to skillet; drizzle with juice mixture, and sprinkle with sugar.
Cover and cook over medium heat 5 minutes or until tender and glazed. Serve warm with whipped cream, if desired.