Prepare the squid: Wash and pat dry the squid.
Make the marinade: In a bowl, mix olive oil with lemon juice, then add garlic, rosemary, chili, salt, and pepper. Coat the squid in the marinade and let it rest for 2–4 hours.
Preheat the grill: Remove two grates and place a cast iron griddle in their place. Set the grill to medium and preheat until the plate reaches 200°C (390°F). Lightly oil the plate before grilling.
Grill the squid: Drain excess marinade and place the squid on the hot griddle. Grill for 4 minutes, turning halfway through. Quick grilling ensures the squid stays firm, tender, and springy - overcooking makes it rubbery.
Serve: Drizzle with dressing, sprinkle generously with parsley, and serve alongside crispy bread.