Steps
1. Preheat the oven to 400°F (200°C).
2. Peel and cube the potato, then boil in salted water until tender (about 15 minutes).
3. In a small bowl, mix chopped rosemary, thyme, minced garlic, olive oil, salt, and pepper.
4. Rub the herb mixture evenly over the lamb chop.
5. Heat a skillet over medium-high heat and sear the lamb chop for 2 minutes on each side.
6. Transfer the skillet to the oven and roast the lamb for 6-8 minutes for medium-rare.
7. Drain the potatoes and mash with roasted garlic, milk, and butter until smooth. Season with salt and pepper.
8. Let the lamb rest for 5 minutes before serving alongside the garlic mashed potatoes.