Heat oil in medium skillet. Cut mushroom into 1/4-inch-thick slices.
Saute in hot oil until lightly browned, about 5 minutes. Place on
focaccia. Arrange anchovy strips on top. Sprinkle with rosemary.
Sprinkle on cheese.
Place on baking sheet. Bake at 400 degrees until cheese melts and bread
is hot, 6 to 10 minutes. Serve hot.