Easy Beef Manhattan Recipe

Ingredients

• 1–2 lb beef chuck roast
• Salt and pepper, to taste
• 2 tablespoons olive oil
• 1 cup red wine vinegar
• 1 onion, sliced
• 4 cloves garlic, minced
• 2 cups beef broth
• 1 tablespoon Worcestershire sauce (or your preferred sauce)
• 1 packet gravy mix
• Mashed potatoes, for serving