This maple-glazed salmon is sweet and salty with a nice kick thanks to cayenne pepper. It's baked then broiled in foil, making cleanup a breeze.
Position rack in upper third of oven; preheat to 425°F. Whisk maple syrup, lime juice, soy sauce, cayenne and garlic powder together in a small bowl.
Place a large sheet of foil on a large rimmed baking sheet. Place salmon fillets, skin-side down, in the middle of the foil. Pat the salmon dry with paper towels. Brush or spoon half of the maple mixture (about 1/4 cup) evenly over the salmon; set aside the remaining maple mixture. Bring the edges of the foil together over the salmon and crimp tightly to contain the maple mixture in the foil. Bake until the salmon just starts to turn opaque, 12 to 15 minutes. Remove from oven; open the top of the foil to expose the salmon, but keep the foil edges upright to contain the maple mixture. Pour the reserved remaining maple mixture over the salmon. Return the pan to the oven and turn the broiler to high. Broil until the salmon starts to brown in places, about 5 minutes.
Remove the pan from the oven. Spoon some of the maple mixture in the foil over the salmon. Let rest for 5 minutes (the maple mixture should thicken slightly). Transfer the salmon to 4 plates and spoon or pour the maple mixture over the top. Sprinkle evenly with chives and salt. Serve with lime wedges, if desired.