Make this easy Tuna Pasta Gratin recipe. This delicious dish is perfect to prepare for your kids, as they will love the flavors. The best part is that you only need 5 very easy-to-find ingredients like corn, canned tuna, rigatoni pasta, water, and salt. Enjoy a simple recipe like this Tuna Pasta Gratin with a very appealing presentation that will make you crave this dish. Do you like this easy meal?