1 cup
packed fresh cilantro leaves and stems, plus more for serving
½ cup
fresh lime juice, (from about 4 limes)
2 tablespoons
soy sauce or tamari
2
garlic cloves
2
serrano peppers, halved and seeded
2 tablespoons
water
¼ teaspoon
sea salt
6 ounces
sushi-grade ahi tuna, thinly sliced against the grain
1
small avocado, thinly sliced
Tortilla chips, for serving (optional)
Method
Fill a small bowl with cold water. Add the onion and set aside to soak.
In a food processor or blender, combine the cilantro, lime juice, soy sauce, garlic,1 of the serrano peppers, 2 tablespoons of water, and the salt. Blend until mostly smooth but some texture remains, about 30 seconds. Spread the sauce on the bottom of a large rimmed plate.
Arrange the tuna in a single layer on top of the sauce. Top with the avocado slices. Drain the red onion and pat dry. Thinly slice the remaining serrano pepper. Layer the onion and pepper on top of the avocado.
Garnish with fresh cilantro and serve immediately with chips alongside for scooping, if using.