Foodies travel from miles around to dine at this relative newcomer, a restaurant that rivals many of the most celebrated Lisbon gastronomic temples for its creative takes on traditional Portuguese cuisine. These might include farinheira with quail egg (so that’s egg with herbs and pork fat), lamb croquettes with mushroom aioli, or braised black pork cheeks. “Mercearia” means grocery shop, and so it is, at the front, meaning diners can take excellent treats with them for the road.