These quick pickled red onions are the best way to add a punch of flavour to burgers, tacos, salads, and more. I love making homemade spicy pickled onions. It takes only a handful of ingredients, a few minutes of hands-on time, and is an easy low sugar recipe you'll make again and again.
Thinly slice your red onions using a sharp knife or mandoline. Thinly slice the chili pepper.
Pack 2 cups thinly sliced red onion, 1/2 - 1 a thinly sliced chili pepper, and 2 tsp of black peppercorns into a wide-mouthed mason jar.
In a small saucepan, combine 1/2 cup apple cider vinegar, 1/2 cup water, 1/4 tsp sea salt, and 2 tablespoons of sugar.
Heat the vinegar mixture over medium heat until the sugar has completely dissolved.
Carefully pour the hot vinegar mixture over the onions.
Press the onions down using a glass so they are fully submerged.
Set aside on the counter top to cool for 30-60 minutes.
Transfer the pickled onions and liquid into a container with a lid and keep in the fridge.