Pickled red onions are a simple easy refrigerator pickle project to add to your repertoire ~ they're not only beautiful, they're a workhorse when it comes to jazzing up lots of different kinds of foods!
2medium red onions
1/2tspyellow mustard seeds
pinchof sea salt
i jalapeno or Serrano peppersliced, seeds and all
Peel and thinly slice the onions. I used my mandoline slicer for this as it does a nice, even job.
Put the vinegar, water, and all the spices in a small pan and bring up to a simmer. Take off the heat, and add the onions and hot pepper. Mix well.
Place the onions in a mason jar and pour the liquid over them. Make sure the liquid covers the onions. Let cool, then cover and refrigerate.