This Danish-style red onion pickle is light, bright and easy to make. It is inspired by my good friend and Danish preserving guru Helena Grayston. Aside from forking it straight from the jar, you’ll find it wonderfully versatile to serve with salads, grilled or fried foods, or try it in sandwiches or on top of hot dogs. For this recipe you will need 400ml/14fl oz sterilised jars. For information on sterilising see the Recipe Tips.