Preheat oven to 425 degrees. Foil-line a baking pan with sides.
Combine cranberry sauce, apple jelly, mustard, crushed bouillon, horseradish, garlic powder and thyme in a saucepan. Bring to a boil.
Place pork loin in pan, fat side up. Sprinkle evenly with salt and pepper. Use a pastry brush and a small spoon to completely coat the pork with sauce.
Cook until pork is no longer pink in the center, about 45 minutes, basting every 10 minutes with remaining sauce. An instant read thermometer inserted into the center should read 145-150 degrees. Makes 8-10 servings. Enjoy!