Remove skin and bones from salmon, cut into individual portions then place in a shallow dish. In a small bowl, stir together brown sugar, honey, soy sauce and sriracha until sugar and honey are dissolved. Pour over fish then marinate for at least 2 hours or up to 8 hours, turning once halfway through.

Place an oven rack about 6" from the top heating element and preheat oven to broil. Line a baking sheet with aluminum foil then lightly coat with cooking spray. Remove fish from marinade and place on a baking sheet. Transfer marinade into a small saucepan.

Broil fish for about 8 minutes per inch of thickness for medium or until fish flakes when gently pressed with a fork. Remove from oven then set aside to rest.

Place saucepan with reserved marinade over medium heat and bring to a boil. Reduce heat to low then allow marinade to simmer for about 4–5 minutes or until thickened slightly.

Brush or spoon a light layer of glaze over fish and serve right away with additional sauce on the side.