Clean and trim the mushrooms and cut into thin slices. Put the
oil, garlic, chopped parsley and mushrooms into a saucepan and
cook over a moderate heat, stirring and turning occasionally,
until mushrooms are tender.
Cut the ham and cheese into small dice.
Cook the pasta until tender but still firm, drain well, and stir in the mushrooms,
ham, and mozzarella cheese. Add salt and pepper, to taste.
Transfer the pasta and ham mixture to a buttered 2-quart baking dish and
place in a preheated 450° oven until the cheese begins
to melt and the pasta has browned a little.