PAT short ribs dry and season with salt and pepper.
COAT a large, nonstick pan with olive oil. Sear the short rib pieces over medium-high heat for about 2-3 minutes on each side or until brown. Transfer short ribs to a bowl.
ADD onions to pan and cook over medium heat for approximately 3 minutes. Once onions are translucent, add garlic and cook for 1 minute; do not brown. Add Chianti, rosemary, beef broth and tomatoes to the pan one at a time, allowing liquid to partially evaporate before each addition (about 2 minutes).
RETURN short ribs to pan, including any juices that might have accumulated in the bowl. Cover and let simmer for 3 hours on low heat to complete the braising process. Remove short ribs from pan and boil the liquid until it is reduced by half; about 10 minutes.
RETURN short ribs to pan and heat thoroughly.
SERVE with potatoes or risotto and vegetables.
*Your grocery store butcher can cut into individual ribs and de-bone.