In a small glass bowl, whisk together the extra virgin olive oil, fresh lemon juice, minced garlic, finely chopped rosemary, thyme, sea salt, and black pepper.
Place the lamb loin chops in a shallow ceramic dish and pour half of the herb marinade over them, turning each chop to ensure they are thoroughly coated.
Cover the lamb and allow it to marinate at room temperature for 20 minutes to let the flavors penetrate the meat.
In a separate mixing bowl, toss the sliced zucchini, chopped red bell pepper, and red onion with the remaining half of the marinade.
Preheat a grill or cast-iron grill pan over medium-high heat until it is lightly smoking.
Place the lamb chops on the hot grill and sear for 4 to 5 minutes per side for medium-rare, or until your preferred level of doneness is reached.
While the lamb cooks, arrange the vegetables on the grill and cook for 5 to 7 minutes, turning occasionally until they are tender and show distinct char marks.
Transfer the grilled lamb chops to a warm plate and let them rest for 5 minutes to redistribute the juices before serving alongside the roasted vegetables.