bring a large pot water too a boil add salt as desired add maccaronie

add 1 can of cream of mushroom soup and 1 cup sour cream into a large sauce pan set burner on low and slowly start adding shedded cheese ( up to 16 oz.) taste test it as you add the cheese for a flaver of your likeing

preheat oven to 350°F

drain macaronie well and return to pan

add the 3 cans of tuna (drained) to the sauce and mix gently. breaking up the large peices of tuna

add sauce mix to macaronie and mix well

add mixtuer to a 9x13 baking dish and level it out add remaining cheese to cover the top generously and sprinkle the frenches onions over the top.

place into oven and cook until cheese is melted and onions are browned