Use scissors to cut each nori sheet into four equal squares (12 total).
In a bowl, toss cubed salmon with sesame oil, soy sauce, honey, scallions, and spices. Let marinate for 30 minutes to 4 hours.
Place one nori square in each slot of a silicone muffin tray and press in 1 tbsp cooled sushi rice.
Fill each muffin slot with 4–5 cubes of marinated salmon.
Preheat oven to 400°F (200°C). Bake for 15–17 minutes. Optional: broil for 1–2 minutes to brown the tops.
In a small bowl, mix Kewpie mayo, Sriracha, and honey. Adjust to taste.
Let muffins cool slightly. Top with avocado cubes, black sesame seeds, and a drizzle of spicy mayo.
