Whisk all ingredients except salmon together in a bowl; place in large resealable bag. Add Alaska Salmon; seal bag and turn several times to coat. Marinate in refrigerator for 15 to 30 minutes. Heat oven to 375 degrees F. Transfer salmon and some of the onions to a spray-coated baking dish. Cover pan and roast about 15 minutes, cooking just until fish is opaque throughout.
Variation: Place marinated salmon on well-oiled grill preheated to medium-high heat (450 degrees F). Cook 8 to 10 minutes, turning once during cooking. Cook just until fish is opaque throughout.