These pickled red onions are crunchy, crisp, and perfectly tangy. Learn how to make quick pickled red onions in just 30 minutes using just 5 easy ingredients. The best condiment for burgers, steaks, salads, toasts, or poke bowls!
Make the pickling liquid – In a medium saucepan over medium heat, combine the vinegar, water, peppercorns, garlic, salt, and sweetener. Heat until it just starts to simmer, stirring until the salt and sweetener are fully dissolved.
Prepare the onions – Slice the red onion in half, then cut into very thin strips. Place the sliced onions in a clean jar.
Pour and cover – Carefully pour the hot vinegar mixture over the onions, making sure they are fully submerged. Seal the jar and gently shake to distribute everything evenly.
Let them pickle – Let the onions sit for at least 30 minutes, or until they turn bright pink and slightly softened.
Store – Serve right away or store in the refrigerator for up to 2 weeks. The flavor will continue to develop over time.