1 package Noodles
1/2 cup sour cream
1/4 cup all-purpose flour
2 tbsp. Worcestershire sauce
1/4 tsp. black pepper
1/2 tsp. salt
1 1/2 cups beef stock
2 tbsp. butter
2 cloves garlic, minced
1 cup sliced onion
8 oz. baby bella mushrooms, washed and sliced
1 1/2 pounds beef sirloin, cut into 1/4" thick pieces
1 tbsp. olive oil