Preheat oven to 400 degrees F.

Spray small rimmed baking pan with nonstick spray. Place salmon fillets, skin side down, on prepared pan and sprinkle with 1/2 teaspoon salt.

Transfer to oven and bake 18 to 20 minutes or until salmon is opaque throughout and internal temperature reaches 145 degrees F.

Meanwhile, in small saucepot, stir together bourbon, brown sugar, soy sauce, vinegar, ginger and garlic. Heat to boiling over medium-high heat. Cook 3 to 5 minutes or until mixture is reduced by half, stirring occasionally.

Remove from heat and whisk in butter, white pepper, and remaining 1/4 teaspoon salt.

When salmon is finished cooking, remove pan from oven. Evenly spread glaze over salmon.

Set broiler to HIGH and place salmon under broiler. Cook 1 minute or until glaze becomes bubbly and slightly caramelized, watching very carefully.

If desired, slip spatula between salmon skin and flesh to remove skin before serving. Serve salmon garnished with green onion, if desired.