Tuna and Watermelon Ceviche is a refreshing and light dish that combines the flavors of fresh tuna, juicy watermelon, and tangy lime juice. The tuna is marinated in lime juice, which helps to cook the fish and infuse it with citrusy flavor. The watermelon adds a sweet and juicy element to the dish, while the addition of jalapeno and cilantro gives it a spicy and herbaceous kick. This ceviche is perfect for a summer appetizer or light lunch.