Tuna is a great source of protein and has a low glycemic index, which is basically a measurement of the amount of carbohydrates (mainly sugar) in a food. I think the simplest way to eat tuna at home is by buying canned tuna. The problem is that it does not have the most pleasant taste.. It tastes pretty fishy. This recipe helps get rid of that fishy taste and makes the canned tuna taste good! There is one ingredient that you cannot skip – it’s the key!