1. Pat pork tenderloin dry with paper towels, and sprinkle with salt and pepper. Coat a roasting rack with cooking spray, and place in a roasting pan coated with cooking spray. Place tenderloin on rack.
2. Bake, on middle oven rack, at 375° for 25 minutes or until a meat thermometer inserted into thickest portion of pork tenderloin registers 160°.
3. Melt 2 Tbsp. butter in a small saucepan over medium-high heat; add 1/2 cup diced onion, and sauté 3 minutes or until golden and tender. Reduce heat to medium, and stir in diced apples and next 4 ingredients. Cook, stirring occasionally, 3 minutes or until apples are slightly softened.
4. Cut pork diagonally into 1-inch-thick medallions, and arrange on a serving platter; spoon Cherry-Apple Chutney over pork.