Step 1

In a large skillet, heat the oil on medium-high. Season the short ribs with salt and pepper. In 2 batches, add to skillet and cook 8 min., until browned on two sides.

Step 2

In a large slow cooker, combine the onions, tomato paste, and garlic. Top with short ribs, broth, red wine, and vinegar.

Step 3

Cover and cook on low 6–8 hours, until ribs are very tender. Remove ribs from cooking liquid and serve. Skim any excess fat from cooking liquid and serve with short ribs.