01 -
Mix balsamic vinegar, garlic, cranberry sauce, brown sugar, red pepper flakes, salt and olive oil in a large food storage bag.
02 -
Pierce roast all over, place in marinade bag. Close and massage. Refrigerate overnight, turning occasionally.
03 -
Heat oven to 350F. Remove roast from marinade, wipe with paper towel.
04 -
Heat vegetable oil in cast iron pan over medium heat. Sear beef until golden brown on all sides.
05 -
Add marinade, beef broth, cranberries and thyme to pan. Mix well.
06 -
Transfer pan to oven. Cook about 20 minutes per pound until thermometer reads 140F for medium rare.
07 -
Remove from oven. Let rest 15 minutes before carving. Serve with pan sauce.