Pound two pounds round steak and dredge with mixture of 1/4 cup flour, 1 teaspoon dry mustard, salt and pepper to taste. Brown well, put in casserole, covering meat with sliced onions. Add water (about 2 cups) to pan in which meat has been browned, stirring well.

Slowly blend in 1 can mushroom or golden mushroom soup. When gravy is smooth, pour over meat. Cover and cook in 325 degree oven for 1 1/2-2 hours.