Dice fresh fish (such as salmon or tuna) into cubes.
Cut vegetables like avocado, cucumber, and red onion into bite-sized pieces.
Place rice (brown or white) in a bowl.
Top the rice with the fish, vegetables, seaweed, green peas, and other desired toppings.
Mix soy sauce, sesame oil, and lemon juice to make a sauce.
Drizzle the sauce over the bowl and sprinkle with sesame seeds to finish.