Braised Short Ribs

Name: Braised Short Ribs
Prep time: 30 min
Cook time: 3 h
Total time: 3 h 30 min
Cuisine: American
Ingredients: 4 pounds boneless short ribs, trimmed of excess fat and silver skin, cut into 3-in chunks (see note); 2 teaspoons kosher salt; ½ teaspoon freshly ground black pepper; 2 tablespoons olive oil; 2 medium yellow onions, diced; 6 cloves garlic, roughly chopped; 1½ tablespoons tomato paste; ¼ cup all-purpose flour; 2⅓ cups red wine; 1 cup beef broth; 2 teaspoons sugar; 1 bay leaf; 5 sprigs fresh thyme; 2 large carrots, sliced ½-in-thick diagonally