Cut the salmon into bite-sized cubes.
Finely chop the onion, cucumber, avocado, and other vegetables.
In a bowl, combine the salmon, vegetables, and poke sauce (soy sauce, sesame oil, lemon juice, sugar, etc.) and mix well.
Place the salmon and vegetables on top of rice.
Add toppings such as seaweed, sesame seeds, or mayonnaise to your liking.