Pickled Red Onions

I want to share with you a recipe for a wonderful condiment that will come in handy in a whole bunch of cases and for a whole bunch of dishes. This is pickled red onion. It will be good for barbecue, herring, roasted pork shank, hamburgers, and many other things. Just today I served it with oven-roasted mackerel. In general, it's a very versatile stuff. It also keeps well.

You can marinate white salad onions in it. You can also pickle yellow onions, but they will still be a bit pungent when finished.