The red onions’ flavor intensifies the longer they are stored in the pickling liquid. Since the onions are so thinly sliced, they can be used after 30 minutes of marinating.
This slaw tastes better the longer it sits; it can be made a day in advance and stored in an airtight container in the fridge.
Fish Tacos appears in Naomi’s newest cookbook, Perfect Flavors, published by ArtScroll Mesorah Publications. Photography by Miriam Pascal.