This was kinda a trial and error thing but its now one of my hubby's favorites and so easy
½ lb pasta, any shape
1 can of tuna
1 Tbsp mayonnaise
1 can of cream of mushroom soup
2 oz parmesean cheese
6 oz shredded mozarrella or pizza cheese, divided
Boil pasta according to package instructions, drain.
Drain canned tuna and flake. Mix with mayo, (a little less than you like for plain tuna fish w/ mayo). Then add parmesean cheese, 4 oz shredded cheese, cream of mushroom soup.
Add pasta into tuna and cheese mixture and combine.
Pour into baking pan and top with remaining shredded cheese. Bake @ 350 x 30 min (can be longer if you like it crispy).