The ratio of uncooked rice to water should be 1 part rice to 1 1/4 parts water.
First, wash the rice, combine the water and the rice in a pan and cook medium heat until you see the surface of the water becoming white, lower the flame and cover with the lid for about 18 minutes.
For the rice vinegar, mix the ingredients in a pan at medium heat until the sugar dissolves.
Let the rice cool down then add the rice vinegar.
In a pot bring water to boil then add salt and the edamame, return to a boil and cook for 5 minutes
Slice the avocado and season with olive oil, lemon, salt and pepper
In a bowl mix, a tsp of soy sauce and tsp of olive oil and gently rub the tuna steak with the back of a teaspoon.
Set the white and black sesame seeds on a plate, dredge the tuna steak into it.
In a bowl set the rice first then the edamame and avocado season with a little bit of olive and soy sauce. Add the hot tuna just right before you serve it.