I eat these like popcorn when I make them. Even if you don't want to make them to eat as a snack on their own, they are great on tacos, wraps, sandwiches or salads. In my opinion, these have just the right balance of tangy, salty and sweet. I love them on corn tortillas with Black Beans, Guacamole, and Scotch Bonnet Salsa.
1 c. cold water
1 1/4 c. apple cider vinegar
3 Tbsp. kosher salt
1 Tbsp. unrefined sugar
1 large or 2 small red onions
2) Slice the onion into thin strips. You could do rings, or any shape you want, I just think strips are the easiest shape to deal with.
3) Place the onions into the liquid and weight them down with a small glass or ceramic object (such as a small plate, bowl or lid). Let the onions sit at room temperature in the liquid for 1-5 hours.
4) Drain the onions in a strainer and briefly rinse them off in cool water. Store the onions in a glass container in the fridge for at least a week, maybe longer.