This Tuna Tostada is a lime and soy sauce marinated tuna on a tostada and garnished with a chipotle aioli, avocado, and scallions.
Contramar is my favorite restaurant in Mexico City. It is this 20-year-old restaurant in the Roma district of CDMX. Anytime a friend is traveling to Mexico city and they ask for recommendations, I always say to dine at Contramar. It is like no other restaurant. It is a seafood focused Mexican restaurant that uses limes, spices and chiles on all their seafood. I usually go for lunch as it is almost impossible to get a dinner reservation!
If you are making this delicious appetizer, you have got to chase it down with a Paloma or a light beer. It is to die for. You should definitely research your local fish markets and get the freshest fish possible. The flavors will all come together!
How to make this Tuna Tostada
Make the chipotle aioli. Place egg yolk, lemon juice, garlic, chipotle chilies and salt in a food processor or blender and blend. Slowly add the oil and blend until smooth.
Prepare the tuna. Cut the sashimi grade tuna into slices. Make sure to cut against the fibers/lines of the tuna. Place slices of tuna in a large mixing bowl and add the juice of 4 limes, sesame oil and soy sauce. Stir and let it marinate for 5 minutes.
Assemble the Tostadas. Spread the chipotle aioli on a tostada. Place 2-3 slices of the marinated tuna on the tostada and garnish with the avocado, scallions and everything but the bagel seasoning.