Spray the aluminum foil-lined sheet pan with cooking spray and place salmon fillets on the pan, skin side down. Using a tablespoon measure, drizzle the top of the fillets with the honey mustard sauce.
Place sheet pan in the oven and bake at 400°F for 10 minutes, or until salmon is cooked through and reads 140ºF (Don't overcook it, though! It's ok if the salmon is a little rare in the center — it will continue to cook after you remove it from the oven). Serve with any remaining honey mustard sauce.