Ahi tuna tostadas are the perfect light and fresh meal or appetizer—crispy fried corn tortillas topped with sushi-grade ahi tuna, creamy avocado, spicy sriracha mayo, and fresh cilantro. They’re like a deconstructed sushi roll in tostada form, with the crunch of the tortilla adding an irresistible texture.
The combination of fresh, buttery tuna, cool avocado, and spicy mayo is absolutely addictive. These tostadas come together in minutes and are perfect for warm weather entertaining, light lunches, or impressive appetizers.
Make the Sriracha Mayo
In a small bowl, whisk together the mayonnaise, sriracha, and lime juice until smooth. Transfer to a squeeze bottle or small bowl for drizzling.
Prepare the Tuna
Using a very sharp knife, dice the ahi tuna into small cubes (about ¼-½ inch). Place in a bowl. Add the soy sauce, sesame oil, lime juice, and sesame seeds. Gently toss to combine. Be careful not to break up the tuna.
Assemble the Tostadas
Place the tostada shells on a serving platter. Arrange avocado slices or diced avocado on each tostada. Spoon the seasoned tuna over the avocado.
Add Toppings
Drizzle with sriracha mayo. Sprinkle with fresh cilantro, radish slices, jalapeño, and additional sesame seeds.
Serve
Serve immediately with lime wedges on the side.
Pro-Tips for Ahi Tuna Tostada Perfection
- Use Sushi-Grade Tuna: This is non-negotiable. Buy from a trusted fishmonger and ask for sushi-grade.
- Keep the Tuna Cold: Chill the tuna until the last moment, and assemble just before serving.
- Sharp Knife: A very sharp knife is essential for cleanly dicing the tuna without crushing it.
- Don’t Over-Sauce: The tuna should be lightly dressed—you want to taste the fish, not just sauce.
- Homemade Tostada Shells: For extra freshness, fry your own corn tortillas until golden and crisp.
- Serve Immediately: These tostadas wait for no one—the shells will soften if they sit too long.
- Variations: Add mango for sweetness, or try a spicy mayo with chipotle instead of sriracha.
- Make It a Meal: Serve with a side of black beans or a simple salad.
These Ahi Tuna Tostadas are fresh, spicy, crunchy, and absolutely delicious.
