Ingredients:

  • 1 medium red onion, thinly sliced (approx. 8 oz / 225g)
  • 1/2 cup (120ml) apple cider vinegar
  • 1/2 cup (120ml) water
  • 1 tsp (6g) sea salt
  • 1 tbsp (12g) honey
  • 1 clove garlic, smashed
  • 1/2 tsp (1g) whole black peppercorns
  • 1 pinch (0.5g) red pepper flakes

Instructions:

  1. Slice the red onion into thin, uniform half-moons, approximately 1/8 inch (3mm) thickness.
  2. Combine the apple cider vinegar, water, salt, and honey in a small saucepan over medium heat.
  3. Stir constantly until the salt and honey fully dissolve and the liquid just reaches a simmer; avoid a rolling boil.
  4. Pack the sliced onions, smashed garlic, peppercorns, and red pepper flakes tightly into a 16 oz wide-mouth mason jar.
  5. Pour the hot brine over the onions until they are completely submerged and press down with a spoon to remove air bubbles.
  6. Let the jar sit at room temperature for 30 minutes before sealing and refrigerating.