Cut the salmon into bite-sized cubes.
Dice the cucumber, avocado, and cherry tomatoes.
Place the salmon, cucumber, avocado, and cherry tomatoes in a bowl.
Mix soy sauce, sesame oil, lemon juice, minced garlic, and sesame seeds to make oriental sauce.
Add the sauce to the ingredients and gently toss together.
Transfer to a bowl and top with seaweed, onion, and scallions.