Manteigaria is a tiny, no-frills pastry shop best known for its intensely flaky, freshly baked pastéis de nata, so treat it like a quick snack stop rather than a sit-down meal. Expect a short but steady line and head there early or in the late afternoon to avoid the busiest rush; ask for the ones straight from the oven and eat them warm with a sprinkle of cinnamon and sugar. The place is mostly takeaway with limited standing room, cards are usually accepted but having a few euros helps, and you should plan to sit on a nearby bench or keep walking while you enjoy them.