In a small bowl, whisk together the olive oil, minced garlic, finely chopped rosemary, sea salt, and black pepper to create the marinade.
Place the lamb loin chops in a shallow dish and rub thoroughly with the herb marinade, ensuring all sides are coated. Let rest for 15 minutes at room temperature.
Preheat your grill or grill pan over medium-high heat. While the grill heats, slice the zucchini into rounds and chop the red bell pepper into large bite-sized pieces.
Place the lamb chops on the hot grill and cook for 4-5 minutes per side for medium-rare, or until they reach your desired level of doneness.
While the lamb cooks, place the zucchini and bell peppers on the grill (or in a separate roasting pan) and cook until tender and slightly charred, about 6-8 minutes.
Remove the lamb from the heat and let it rest for 5 minutes to allow the juices to redistribute.
Toss the roasted vegetables with the fresh lemon juice and serve alongside the grilled lamb chops.