Family Favorite Cheesy Tuna Casserole

Cook macaroni in salted boiling water as directed on the package until tender.

While macaroni is cooking, mix the rest of the ingredients in a medium sauce pan on medium/low heat until cheese is melted and ingredients are well blended. I use medium cheddar or a three cheese mixture of packaged shredded cheese for casseroles if I have it.

Drain macaroni and combine with the sauce. Pour into a buttered casserole and bake COVERED at 350 degrees for about twenty minutes. Remove from the oven and spread onion rings on top. Return to the oven uncovered and watch carefully for about ten minutes until the casserole is bubbly and onion rings are toasted, but not overly browned. Let rest for about ten minutes before serving.