I eat lots of canned tuna... and chicken. I take my protein in small dosis throughout the day. maybe the equivalent to about half a can of tuna.. about five times a day.
Protein is not digested well by the body and is much more effectively used in very small amounts. Fore example, when you eat a big chicken breast during one meal.. your body is only able to process and effectively use between 25 and 40grams of that protein and put it to use in muscle regeneration. (the amount of usable protein depends on the person.. whether or not they're active.. if they work out etc..)
I get somewhere between 120 and 200 grams of protein per day.. divided up into 5 periods throughout the day. The rest of my food is all fruits and vegetables plain oat meal, brown rice and lots of Quinoa
Of course I love to splurge out and get Chinese, thai, indian and mexican sometimes.. but only a couple times a month