1Whisk lemongrass, garlic, honey and nam pla in large bowl. Add lime juice and pepper. Place pork in the bowl, turning to coat; let stand while you preheat grill or broiler.
2Grill or broil pork, spooning marinade over as it cooks, until nicely done, about 10 minutes. Turn only once so that each side browns nicely. Serve with remaining lime and, if you like, the herb garnish.