Mushroom Orzotto

Prepare orzo per package directions to al dente. Drain, and toss to separate, but do not rinse, and set aside.
Meanwhile, saute onion, mushroom, and garlic in butter until tender.
Add tomatoes and cook about 5 minutes. (less is needed, if tomatoes are canned)
Add 1 cup half and half, nutmeg, salt and pepper, and heat to warm through and slightly thicken, about 5 minutes.
Add drained pasta, toss or lightly stir to combine and coat pasta. This will also help thicken the sauce. Add more half and half, 1 T at a time, until desired consistency.
Remove from heat and add cheese, stirring carefully until melted, thickened, and combined.