Cook linguine according to package directions. In a large, heavy skillet, sauté asparagus, mushrooms, carrot, zucchini and ham in butter until vegetables are tender. Add cream, peas, onions, Parmesan cheese, basil, salt, pepper and nutmeg. Bring to boil. Reduce heat and simmer 3 minutes, stirring frequently. Rinse and drain linguine; add to vegetable mixture and toss to coat. Sprinkle with additional Parmesan cheese if desired.