Combine the olive oil, minced garlic, chopped rosemary, thyme leaves, salt, and pepper in a bowl. Mix well to create the marinade.

Place the Costco lamb chops in a resealable plastic bag or a shallow dish. Pour the marinade over the chops, ensuring they are well-coated. Seal the bag or cover the dish and refrigerate for at least 1 hour, allowing the flavors to infuse.

Preheat the grill to medium-high heat.

Remove the lamb chops from the marinade and let any excess drip off.

Place the lamb chops on the grill and cook for about 3-4 minutes on each side for medium-rare doneness. Adjust the cooking time based on your desired level of doneness.

Once cooked to your preference, remove the lamb chops from the grill and let them rest for a few minutes before serving.

Serve the grilled Costco lamb chops with a side of mint-infused yogurt sauce and a Mediterranean salad for a complete and delightful meal.