INGREDIENTS
1 1/2 lb
steak (boneless ribeye, top sirloin, etc)
4 tbsp
butter, divided
10 oz
mushrooms, sliced
1
medium onion, finely chopped
1 clove
garlic, minced
3 tbsp
all-purpose flour
1 3/4 cups
beef stock or broth
2/3 cup
sour cream
Salt and pepper
1 tbsp
Worcestershire sauce (optional)
1 tsp
Dijon mustard (optional)
Parsley, for garnish
Hot buttered egg noodles or mashed potatoes, for serving