Tarte à l'oignon
| Alternative names | Zewelwaï |
|---|---|
| Course | Starter |
| Place of origin | France |
| Serving temperature | Hot, warm or cold |
| Main ingredients | Onions, shortcrust pastry |
Tarte à l'oignon or Zewelwaï is a savoury tart with a baked filling of onions and cream. It is a speciality of the French region of Alsace, and may be served hot, warm or at room temperature. It is typically served as a starter.