While the ribs are cooking, sauté onions and celery in beef fat and oil
Cook until onions are traslucent
Add tomato paste and stir completely coating onions and celery
Add 1 cup of root beer and scrape bits from the cooked beef and onions from the bottom of the pan
Add remainder of liquid and add red pepper flake
Bring liquid to a simmer
Submerge seared ribs into braising liquid and let cook for 2 hours
Check periodically, looking for meat to be fork tender.
Remove from liquid and serve over cooked rice.