Stashcook | Beef Patties with Creamy Mushroom Sauce & Herb Mashed Potatoes

Ingredients

• 20 fl oz beef broth
• 4 medium russet potatoes
• 1 lb lean ground beef
• 1/2 lb cremini mushrooms
• 1 large yellow onion
• 2 tbsp all-purpose flour
• 1/4 tsp black pepper
• 2 tbsp unsalted butter
• 1/4 cup heavy cream
• 1/4 cup panko bread crumbs
• 1/2 tsp salt
• 1/2 tsp dried rosemary
• 1/2 tsp Worcestershire sauce
• 1/4 cup sour cream
• 1 small bunch chives