Season the fillets to taste with the salt, lemon pepper and garlic powder.
In a small bowl, stir together the brown sugar, soy sauce, water and oil until sugar is dissolved.
Put the seasoned fillets into a Ziploc bag, pour in the marinade mixture, seal and turn to coat. Refrigerate at least 2 hours.
Preheat oven to 450 degrees Fahrenheit.
Line a broiler pan with aluminum foil and make a few slits through the foil with a knife to allow juices to drain while cooking. Spray with nonstick cooking spray.
Place your fillets on the broiler pan and discard the leftover marinade. Place the fillets into your preheated 450 degree oven for 15 minutes.
Then move the fillets to an oven rack close to the broiler and broil on high for an additional 5 minutes or until the fish flakes easily with a fork.
Notes
Marinade Intensity: Adjust the intensity of flavors in the marinade according to personal preference. For a stronger taste, increase the amount of soy sauce or add a dash of sesame oil for depth. Conversely, for a milder flavor, reduce the amount of soy sauce or brown sugar.
Proper Sealing: Ensure the Ziploc bag is securely sealed to prevent leakage and maximize the marinade's effectiveness. For extra insurance against leaks, place the bag in a shallow dish before refrigerating.
Broiling Technique: Keep a close eye on the salmon while broiling to prevent overcooking. The high heat can quickly dry out the fish if left unattended. Adjust the broiling time based on the thickness of the fillets and your personal preference for doneness. If the fillets are thinner, reduce the broiling time accordingly to avoid overcooking.