onion relish: mix all of the following ingredients and store in refrigerator until ready to serve

Onion relish is a condiment composed primarily of finely chopped or minced onions combined with vinegar, spices, and seasonings, then refrigerated for serving. This preserved condiment is a type of pickle or relish that combines the pungent, slightly sweet flavor of onions with acidic and savory elements. The preparation method—mixing raw or lightly cooked ingredients and storing cold—allows flavors to meld while maintaining the texture and bite of the onions. Onion relishes vary regionally; some include additional vegetables such as peppers or cucumbers, while others feature regional spice profiles that reflect local culinary traditions.

The ingredient category encompasses both traditional European-style onion chutneys and more modern vinegar-based relishes common in North American cuisine. The balance between onion, vinegar, and spice creates a versatile condiment with applications across numerous dishes and cuisines.

Onion relish functions as a bright, pungent accompaniment to rich or savory dishes, cutting through fat and adding acidity and textural contrast. It is commonly served alongside grilled meats, hot dogs, hamburgers, sandwiches, and cheese boards, where its sharp bite complements fatty or mild flavors. In some traditions, it appears as a condiment for curries, roasted vegetables, or composed salads. The cold storage and acidic nature of onion relish preserve it for extended periods, making it suitable for advance preparation. It can be stirred into mayo-based spreads, used as a garnish for soups, or included as a component in charcuterie presentations.