Preheat the Air Fryer: Preheat your air fryer to a medium-high temperature, typically around 375°F (190°C). Preheating ensures that the lettuce cooks evenly and becomes crispy.

Prepare the Lettuce: Wash and dry the Romaine lettuce leaves thoroughly. Trim off the tough stem ends if desired. You can leave the leaves whole or cut them in half lengthwise for easier handling.

Coat with Olive Oil (Optional): Lightly brush the lettuce leaves with olive oil. This step is optional but can help achieve a crispy texture and enhance the flavor. Alternatively, you can use a cooking spray to coat the leaves.

Season: Season the lettuce with salt and pepper to taste. You can also sprinkle optional seasonings like garlic powder, onion powder, paprika, or grated Parmesan cheese for added flavor.

Air Fry: Place the seasoned lettuce leaves in the air fryer basket in a single layer, making sure not to overcrowd. Cook for approximately 3-5 minutes. Keep a close eye on the lettuce as it cooks; the cooking time is short, and you want it to be lightly charred and crispy but not overly wilted.

Check for Doneness: After a few minutes, open the air fryer and check the lettuce. It should have charred edges and a slightly crispy texture. Be cautious not to overcook, as the lettuce can become too soft if left in the air fryer for too long.

Serve Hot: Remove the air-fried lettuce from the basket and serve it immediately while it's still hot. Enjoy it as a side dish, as a unique salad component, or as a garnish for various dishes.