Ingredients:

  • 1 large red onion (approx. 300g), sliced into 1/8-inch rings
  • 0.5 cup apple cider vinegar
  • 0.5 cup white wine vinegar
  • 1 cup warm water
  • 1.5 tbsp maple syrup
  • 1.5 tsp fine sea salt
  • 1 clove garlic, smashed
  • 0.5 tsp whole black peppercorns
  • 1 pinch red pepper flakes

Instructions:

  1. Peel the red onion and use a mandoline slicer set to 1/8 inch to create uniform rings or half-moons.
  2. Pack the sliced onions tightly into a clean 16oz glass mason jar, tucking the smashed garlic, peppercorns, and red pepper flakes into the middle of the jar.
  3. In a small glass measuring jug, combine the warm water, apple cider vinegar, white wine vinegar, sea salt, and maple syrup.
  4. Whisk the liquid vigorously until the salt and maple syrup are completely dissolved.
  5. Pour the brine over the onions until they are completely submerged. Use a spoon to press down any floating onions.
  6. Let the jar sit at room temperature for 30 minutes to allow the quick-pickling reaction to turn the onions pink and mellow their flavor.