Place short ribs in noncorrodible vessel. Combine ingredients for marinade and pour over ribs; marinate, covered, for 24 hours in the refrigerator, turning them once. Remove from marinade; pat dry and reserve marinade for later.
Heat oil in an 8 quart casserole, wide enough to accommodate the ribs in a single layer. While the oil is heating up, dredge short ribs in flour and shake off excess. Sear them for 5 minutes a side or until they are golden brown all over. Remove them to a plate. In the remaining oil saute the onions, celery, carrots, and turnips for 10 minutes, stirring frequently with a wooden spoon. Add the chili powder, tomato paste, broth and reserved marinade and boil, over medium heat for 5 minutes or until slightly reduced. Season to taste with salt and pepper. Return the short ribs to the casserole and cover. Braise over low heat for 1 hour and 45 minutes or until fork tender. Remove the short ribs from the sauce and place them on a large baking pan. Strain the sauce, through a sieve into a medium saucepan. Skim off the fat, season to taste with salt and pepper and keep warm, over low heat. Reheat ribs in sauce.
Second time around: Preheat the broiler. Combine all the coating ingredients and spread them
over the short ribs. Broil short ribs, 4 inches away from heat source, for 3 to 4 minutes or until lightly browned. Serve immediately with sauce.