Quick Pickled Refrigerator Red Onions Recipe with apple cider vinegar. These crunch red onions are super easy to make and they add nice flavor to your tacos, avocado toast, salads, burritos, quesadillas, sandwiches, or anything else you can think of that needs a little zing. This recipe is the best! * pickled red onions * quick pickled red onions * pickled red onions with apple cider vinegar * pickled red onions for tacos * easy pickled red onions * refrigerator pickled red onions *