4 ingredient pickled onions (adapted from Fed and Fit)
1 red onion, peeled and thinly sliced
1 1/2 - 2 cups of vinegar ( I mixed red wine vinegar and white vinegar , could also use apple cider
2 tsp fine sea salt vinegar)
1 tsp black peppercorns
Place the sliced onions in a large wide-mouth mason jar. Pour vinegar over the top, adding more if need to, to cover the top of the onions. Add the salt and peppercorns. Seal the jar and shake vigorously to combine. Refrigerate at least one day before serving.