Ingredients.

This one takes a little longer. Chop up some fresh mushrooms and
onions, and saute in butter, margarine, oil, whatever until the
onions are clear. Drain and set aside until cool. On cocktail
bread (rye or pumpernickel), pile a mound of mushrooms and onions,
grated Swiss cheese, grated Italian cheese (i use locatella), and
bread crumbs. Broil until the Swiss melts, and serve immediately.