Cut salmon into 3 portions. Mix together garlic powder, onion powder, smoked paprika, and salt to taste. Season all sides of salmon.
Place on lined baking sheet and bake for 15-18 mins. Turn to broil on high for 2-3 mins.
For glaze,
In a small sauce pan over medium-low heat, add butter, hot honey, soy sauce, minced garlic, lemon juice, and whites of scallions. Mix and let simmer until garlic becomes fragrant, about 2-3 minutes.
To assemble,
Once salmon is cooked, spoon glaze over all sides of salmon. Garnish with lemon zest and greens of scallions.