|Preheat oven to 350 degrees F. Grease a 2 quart baking dish.|
Cook macaroni according to package directions; drain.
Stir cooked macaroni, soup, milk, tuna and peas, if desired.
Pour into prepared dish. Sprinkle with cheese. Bake uncovered at for 20 minutes.
Top with french fried onions and bake 5 more minutes.