Preheat oven to 350°. Peel sweet potatoes; core apples. Cut potatoes, apples and orange crosswise into 1/4-in.-thick slices. Arrange in a foil-lined 15x10x1-in. baking pan coated with cooking spray; sprinkle with salt and pepper. Roast 10 minutes.

Meanwhile, in a microwave-safe bowl, mix orange juice, brown sugar, cornstarch, cinnamon and ginger. Microwave, covered, on high, stirring every 30 seconds until thickened, 1-2 minutes. Stir until smooth.