Created by Tisme on February 27, 2015
Step 1: Heat the butter in a pan and saute the onion for 5 minutes or until onion's are soft. Add the mushrooms and cook a further 2 minutes. Blend the cornflour with a little of the water and add to the pan with remaining water, Vegemite, sauces and mustard. Stir over a medium heat until the sauce thickens.
Step 2: Pour over steaks for serving.