Directions Par-cook the potatoes: Place in a pot of water and boil until fork-tender; let cool.
Slice each potato lengthwise into eighths. Preheat a grill to medium or place a cast-iron grill pan over medium heat.
Mix 1 tablespoon salt, the lime zest and chile powder in a small bowl.
Brush the potato wedges with the oil and season with salt and pepper. Grill until golden brown on all sides (including the skin) and just cooked through, about 1 1/2 minutes per side.
Transfer to a platter; immediately season with the salt mixture and sprinkle with cilantro.