Gordon Hamersley's Bistro Cooking at Home
Beef Short Ribs Braised in Dark Beer with Bacon and Red Onions
Serves 6

6-8 lbs bone-in beef short ribs
Kosher salt & freshly ground black pepper
About 3 tbsp vegetable oil
1/2 lb bacon, cut into 1-inch pieces
2 medium red onions, cut cross-wise into 1/2 inch rounds
2 tbsp tomato paste
2 bottles stout beer, such as Guinness (IPA works too if you're not into stout)
1/4 cup red wine vinegar
2 cups beef stock or combo of beef & chicken stock

Heat the oven to 350. Trim the excess fat from the ribs and season them on all sides with salt and pepper. In a large heavy Dutch oven, heat the oil until very hot. Working in batches, brown the ribs on all sides adding more oil if necessary. Remove the ribs and pour off the rendered fat but don't clean the pot. 
Add the bacon and cook until most of its fat has rendered, about 5 minutes. Add the onions and cook until lightly browned, about 6 minutes. Add the tomato paste and cook, stirring, for another 2 minutes. Add the beer, vinegar and beef stock. Put the ribs back in the pot. Bring to a boil, cover the pot and cook in the oven until they are fork-tender, about 2 hours 15 minutes. (Begin checking them after 2 hours).
Take the lid off and continue cooking the ribs for an additional 15 minutes, uncovered.
Very carefully, so as not to break apart the meat, transfer the ribs and the onions to a rimmed platter or sheet pan and keep warm. Degrease the liquid if necessary. Bring it back to a boil and cook until reduced by at least a third.