In a small food processor, combine the garlic, shallot, lemongrass, brown sugar, and pepper and whirl to a fine texture. Add the canola oil, fish sauce, soy sauce, and molasses and process until relatively smooth, like a wet paste. Transfer to a medium bowl.
Use paper towels to blot excess moisture from the pork. Add the pork to the marinade, turning to coat well, then cover and set aside to marinate at room temperature for 30 minutes. Or, refrigerate for up to 24 hours; let the meat sit out at room temperature for 30 minutes before grilling.
Warm a cast-iron stove-top grill pan over medium-high heat, prepare a medium-hot charcoal fire, or preheat a gas grill to medium-high (you can hold your hand 6 inches above the grill for 3 to 4 seconds). Grill the pork chops for 5 to 7 minutes, turning frequently, until firm and cooked through. Pierce with the sharp point of a knife to test (it’s okay if the center is faintly pink).
Transfer to a plate and let rest for 5 to 10 minutes.
Serve the chops warm, passing the dipping sauce at the table, if desired.