Add brown sugar, apple cider vinegar, Salmon Rub, and hot sauce to a saucepan and whisk to combine. Bring to boil over medium-high heat. Reduce heat and simmer 8 minutes, stirring occassionally. Sauce will become thinner when warmed.

While the sauce is simmering, place 2 large pieces of foil on the counter. Add salmon filet on top and season with salt & pepper.

Remove firecracker sauce from stove. Brush sauce onto salmon. Fold the foil over the salmon, completely sealing it. Grill or Bake the salmon for 12-14 minutes at 375°F. Open the foil and allow the fish to broil in the grill or under the broiler for 2-3 minutes. Top with chopped cilantro and/or green onions, if desired.