I know this is really really late...like three months late, but this is what I do:
cook the pasta, add in cream of chicken soup and cream of mushroom soup, add in the canned tuna. I then put it in an oven dish and put on the top bread crumbs, crushed crisps (yes crisps - I use walkers plain or cheese and onion) and then put cheese on top. Stick in the oven for about 15 mins and WALLAAH, Absolutely beautiful.