Ingredients

• 6 tablespoons butter
• 3 medium onions , thinly sliced
• 1 tablespoon all-purpose flour
• 1 , 14.5 ounce
• 0.5 cups red wine
• 2 teaspoons Dijon mustard
• 1 teaspoon Worcestershire sauce
• salt and ground black pepper to taste

Instructions

1. 1 Gather all ingredients.
2. 2 Melt butter in a heavy-bottomed pan over medium heat. Add onion; cook and stir until softened, about 10 minutes.
3. 3 Reduce heat to low; cover, and cook until onions are caramelized, stirring occasionally, about 20 minutes.
4. 4 Stir in flour until well mixed.
5. 5 Stir in chicken stock, red wine, Dijon mustard, and Worcestershire sauce; simmer until sauce is thickened, stirring frequently, about 15 minutes. Season with salt and pepper.

Nutrition per serving