Heat olive oil in a skillet over medium heat. Add garlic, celery, and red-pepper flakes.
Saute until celery is softened and golden, about 5 minutes.
Add lettuce, mixing and pressing it down to fit.
Season with salt and pepper.
Cover and cook, tossing occasionally, until lettuce is completely wilted and liquid has evaporated, 10-12 minutes. Enjoy!
Adapted from Food From Many Greek Kitchens, Tessa Kiros, 2011