Prepare this delicious Tuna Ring with Pico de Gallo, an easy and tasty snack recipe. You can choose to use tuna in oil or tuna in water, it will be delicious either way. The best part is that it will take you less time than you think to prepare it, as it is a very quick recipe. The ingredients for this Tuna Ring with Pico de Gallo make it a healthy snack.