Peel the mushrooms; brush away any dirt before you cut away the
stems. Combine the oil, lemon juice, garlic, fresh herbs, salt and
pepper to make a marinade. Add the mushrooms and the sliced
mozzarella; marinate at room temperature for about an hour. Grill
the mushrooms over hot coals for about 2 minutes on each side.
Remove from the grill and allow to rest for 5 minutes. Serve the
mushrooms on lightly toasted kaiser rolls with the lettuce, sliced
tomatoes and marinated mozzarella cheese. Cut each roll into
quarters and serve.
