Pat the salmon dry with a paper towel. Season with salt and pepper. Add the coconut oil to the pan. Cook the salmon (skin side UP if it has skin) for just 2 minutes to get a crust. Flip the salmon, top with the maple mustard sauce, and bake in the oven until it reaches an internal temperature of 135 degrees. The baking time will depend on how thick your salmon is, but generally around 5-10 minutes.