Melt butter; saute onion and ... mix well. Add mushrooms and liquid. If fresh mushrooms are used, add 1/3 ... be served on hamburger buns. Simmer uncovered about 15 minutes to make thicker.
Boil 4 quarts water; add ... pepper, onions and mushrooms. After onion is tender, ... serving, top with fresh grated parmesan cheese. Serve with a green salad and garlic toast.