Slow-Cooker Hearty Beef Oxtail Soup | America's Test Kitchen

Ingredients

• 2 onions , chopped fine
• 1/4 cup tomato paste
• 2 tablespoons vegetable oil
• 1 tablespoon minced fresh thyme or 1 teaspoon dried
• 8 cups beef broth
• 3 carrots , peeled and sliced ½ inch thick
• 3 parsnips , peeled and sliced ½ inch thick
• 2 bay leaves
• 3 pounds oxtails , trimmed
• Salt and pepper
• 2 tablespoons minced fresh parsley