Sometimes, like with sweet-and-sour proteins, the sauce defines the dish and it's especially important to get it right. Executive Chef Kenny Leung of YAO NYC has a simple, five-ingredient recipe ...

You can prepare a large batch and freeze until you’re ready to fry. Serve lumpia with store-bought sweet chili sauce for dipping.

Place the lumpia seam-side down on a tray or plate ... Drain on paper towels, then serve with sweet and sour sauce or vinegar mixed with chillies and a little sugar.