Whisk wine, shallot, oil, flour, garlic, sauce, rosemary, sage, thyme, salt, and pepper; pour into bag. Add rib roast, coat with marinade. Close bag and marinate in the refrigerator for 6 to 24 hours.
STEP 3
Preheat oven to 325 degrees F.
STEP 4
Cut six slits in top of bag for steam. Insert meat thermometer through one slit into center of roast. Tuck ends of bag in pan.
STEP 5
Place pan in oven, ensuring bag does not touch heating elements.
STEP 6
Cook until desired doneness, 1 3/4 to 2 1/4 hours for medium rare. Let stand in bag for 15 minutes before cutting.
STEP 7
Transfer roast to a cutting board; carve. Drain juices from bag, skim excess fat, and stir in butter. Serve hot juices over sliced roast.