Cut the salmon and avocado into bite-sized pieces.
Finely chop the onion.
In a bowl, make a sauce with soy sauce, sesame oil, lemon juice, and wasabi.
Place rice in a bowl.
Add salmon, avocado, onion, cucumber, seaweed, etc. on top of the rice.
Drizzle the sauce over the top.
Sprinkle with sesame seeds to finish.