Ingredients 500 grams of Sirloin Beef Steak. 300 grams of Mushrooms. You can use canned or fresh mushrooms. 1/2 tsp of Black Pepper 1 medium-sized chopped Onion 2 tbsp of Butter 1 tbsp of Cornflour or All-purpose flour 2 tbsp of chopped Chives or Parsley 1 cup of Beef Broth 3 tbsp of Sour cream (Smetana) 1 cup of Heavy cream 2 tbsp of Vegetable oil 1 tbsp of Yellow Mustard 3 minced Garlic cloves 1 tbsp of Worcestershire sauce
