"Spicy Pickled Red Onions adds tangy crunch and a bright pink note to your tacos, enchiladas, and tostadas| The Busy Abuelita..."
INGREDIENTS
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1 medium red onion, sliced into half-moons
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1 cup water
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1/8 tsp salt or pure sea salt
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1 tsp Mexican oregano
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2 cups Apple Cider Vinegar
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Jalapeño, or Habenero(optional)