Combine brown sugar through mint in a plastic bag and squishy to combine flavours. Add salmon to marinade, close bag and let sit on counter for 20-30 minutes. Or use a baking dish.
Place salmon skin side down on piece of tinfoil sprayed with cooking oil, and cut to size. Fold sides up to keep juices in and place on grill. One layer of tin foil is plenty.
Cover grill and allow to cook for up to 10 minutes per inch (measure on thickest part of salmon). Once it starts to flake easily it's ready to eat.