Crunchy tostada shells topped with flavorful, marinated ahi tuna sounds like the perfect meal any time of day, and when it comes to these delicious Ahi Tuna Tostadas, it truly doesn't get any better than this. Tender sushi-grade tuna is mixed with onions, spices, and fresh avocado for a flavor profile that you will be craving 24/7. This recipe is so quick and easy and is perfect to whip up whenever the craving strikes!