Roasted Pork Tenderloin with Apple
2 (1-1.5 lbs.) pork tenderloin 1 ½ tsp. Dijon mustard 1 tbsp. fresh thyme leaves, chopped ¼ tsp. ground black pepper 2 apples, cored and sliced 2 onions, sliced 1 cup chicken stock Heat oven to 425°. Trim each tenderloin of the silver skin. Pat pork dry with paper towels. Then, using your hands, sprinkle …