Vermouth-Marinated Salmon

Combine vermouth, soy sauce, honey, ginger, and garlic in a small saucepan; bring to a boil over medium-high. Cook 6 minutes or until mixture is reduced to 1/4 cup. Pour into a baking dish; cool to room temperature. Add salmon fillets, turning to coat; turn flesh side down. Marinate in refrigerator 30 minutes or up to 4 hours. Heat grill or grill pan to medium-high. Place fish on grill rack coated with cooking spray; grill 4 minutes, flesh side down. Turn fish over; grill 2 minutes or until desired degree of doneness. Sprinkle with green onions and salt.