Hot Beef Sandwiches with Mashed Potatoes Recipe

Ingredients

• 1 ½ lb. Yukon gold potatoes, peeled and cubed
• ½ cup sour cream
• 4 Tbsp. unsalted butter
• ¼ cup whole milk
• Salt to taste
• 2 cups low-sodium beef broth
• 3 Tbsp. all-purpose flour
• 1 Tbsp. unsalted butter
• 1 sprig fresh rosemary
• ½ cup reserved sauce from Pot Roast
• 1 tsp. red wine vinegar
• 8 oz. reserved leftover Pot Roast , shredded into bite-sized pieces
• 1 stick unsalted butter (8 Tbsp.), softened
• ½ tsp. grated fresh garlic
• Salt and black pepper to taste
• 4 slices Texas toast
• Chopped fresh parsley