These Quick-pickled Red Onions are one of the easiest things you can make, but they completely transform a dish. With just a handful of simple ingredients and a few minutes of prep, you get a tangy topping that adds so much flavor and brightness to anything you put it on.
In a small saucepan, add the water, vinegar, salt, and honey. Stir together and bring to a simmer.1 cup water, 1 cup vinegar, 1 tablespoon honey, 1 teaspoon salt
As the liquid heats, slice the onions. I prefer to use a mandoline slicer to get thin slices, but you can also use a sharp knife and cut the onion thinly.1 large red onion
Add the sliced onions to a quart-sized mason jar.
After the liquid comes to a simmer, remove from the heat and pour over the onions.
Leave the onions on the counter until they reach room temperature, and then store in the fridge for 2-3 weeks.
Notes
Be sure to use a heat-safe container when making the pickled onions because you are pouring the hot brine over the onions. I find a quart mason jar to be the perfect size to fit the sliced onions and the brine.
The onions are best the next day to give them time to soften and pick up all of the flavor from the vinegar, but if you are in a pinch they are still yummy right away.