Winter Oxtail Stew (Crowd Cow)

Ingredients

• 2.5 lbs beef oxtail
• 2 cups dry red wine
• 1/4 cup red wine vinegar
• 3 tbsp Dijon mustard
• 3 tbsp olive oil
• 1 carrot, roughly chopped
• 1 shallot, minced
• 1/2 celery root, chopped into 1/2-inch cubes
• 3 tbsp tomato paste
• 1 cup dry red wine
• 3 quart beef stock