Pat the lamb chops dry with paper towels. Rub them all over with olive oil, then season generously on both sides with kosher salt and black pepper. Set aside at room temperature for 15 minutes. Meanwhile, in a small bowl, whisk together the honey, minced garlic, soy sauce, vinegar, chopped rosemary, and red pepper flakes (if using) until well combined.
Preheat your grill (or grill pan) to medium-high heat (about 400-450°F / 200-230°C). Once hot, clean the grates thoroughly with a grill brush, then lightly oil them by dipping a folded paper towel in vegetable oil and using tongs to rub it over the grates.
Place the seasoned lamb chops on the hot grill. Cook for 3-4 minutes on the first side, without moving them, to develop a deep golden-brown crust. Flip the chops and cook for another 3-4 minutes for medium-rare (internal temperature of 135°F / 57°C) or 4-5 minutes for medium (145°F / 63°C).
During the last 2 minutes of cooking on the second side, brush the chops generously with the honey garlic glaze. Flip once more and brush the other side, allowing the glaze to caramelize and become sticky for about 30-60 seconds per side. Be careful not to let it burn.
Transfer the glazed lamb chops to a clean plate or cutting board. Tent loosely with foil and let them rest for 5 minutes. This allows the juices to redistribute, ensuring a juicy bite. Garnish with fresh rosemary sprigs and a light sprinkle of flaky sea salt just before serving.