Cut the tuna into small cubes and the onion and mix.
Step 2
Add to the mixture the juice of a lemon, a tablespoon of soy, one of olive oil, and another of mustard, we also add the ginger, sesame and chia seeds to taste, try salt and if necessary add. Reserve in the fridge.
Step 3
Cut the avocado and place it inside the mold, add a few tablespoons of crushed tomato, and the tuna already marinated.
Step 4
Unmold and decorate with a substitute for black caviar and parsley.