saute the small onion and 1 cup chopped mushrooms togeather, 1 tsp. of thyme and 1/2 cup of butter. If you want this can be doubled for a larger amount of gravey.. once you have tasted this you will want double
when mushrooms are cooked add 1/4 cup flour and stir constantly until flour browns about 5 min. Stir in 1 can of beef broth and 3/4 cup of water. cook until thickened... yum.