California Cheeseburger

Prep Time

40 Min

Cook Time

15 Min


5 burgers


  • ¼ cup Apple cider vinegar

  • ¼ cup White balsamic vinegar

  • ½ cup Water

  • 1½ tsp Kosher salt

  • 1 large or 2 small Red onions, thinly sliced


  • Outdoor grill or Grill pan

  • Saucepan


  1. In a small saucepan, bring the apple cider vinegar, balsamic vinegar, ½ cup of water, and salt to a boil. Boil until the salt dissolves, about 1-2 minutes. Remove from the heat and let cool a minute or two.

  2. Add the sliced red onions to a glass jar and pour the vinegar over the onions. Let the onions sit at least 30 minutes at room temperature before using or place in the fridge for up to 2 weeks.