Slow Cooker Short Ribs

Name: Slow Cooker Short Ribs
Prep time: 10 min
Cook time: 8 h 30 min
Total time: 8 h 40 min
Cuisine: American
Ingredients: 1 tablespoon vegetable oil; 3 pounds beef chuck short ribs (bone-in ); ½ teaspoon salt (or to taste); 1 teaspoon pepper (or to taste); 1 medium onion (peeled and quartered); 2 large carrots (cut into large chunks); 2 medium parsnips (cut into large chunks); 2 sprigs rosemary (fresh); 1 teaspoon thyme (dried); 4 sprigs fresh parsley (stems and leaves separated); 1 tablespoon Worcestershire sauce; 2 bottles dark stout beer (2 12-ounce bottles, such as Guinness)