Clean and finely chop 10 to 12 mushrooms. Saute in 1 to 2 tablespoons of butter until tender. In a mixing bowl, beat one egg well and add mushrooms, 3 or 4 tablespoons of chopped onions, salt, pepper and a dash of nutmeg. Mix well, crumble 10 to 12 saltine crackers, add to mixture and mix well. Shape into patties and fry in a small amount of butter. Serve with favorite burger goodies. Makes two.