Quick Tuna Casserole Name: Samantha Moos Base: Camp Lejuene, NC Recipe: 2 cans of tuna fish 2 boxes of Mac-n-cheese 1/2 can of peas (Optional) 1 onion (Optional) 1st you make the mac-n-cheese just like it says on the box. While that is cooking drain the cans of tuna and the peas. Also cut up your onion. Then when the mac-n-cheese is done, mix in the 1/2 of can of peas, and 2 cans of tuna, and the onion. Then serve.