In a small saucepan, heat the oil over medium heat. Add the ginger and garlic and stir until you can really smell everything and the garlic turns golden, about 3 minutes. Add the soy sauce, brown sugar and crushed red pepper, if using, raise the heat to medium-high and simmer until slightly reduced and syrupy, stirring occasionally, about 5 minutes. Set aside to cool completely.
Pour the marinade into a container or a zipper-top bag and add the pork chops. Seal the container or the bag, and place the chops in the fridge. Refrigerate for 3 to 24 hours.
Preheat the grill to medium.
Remove the pork chops from the marinade. Grill the pork chops for about 4 minutes on each side, until the pork chops reach an internal temperature of 140°. Allow them to sit for 5 minutes before serving or slicing. Top with the scallions, and serve with the lime wedges for squeezing over the chops.