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📝 Ingredients:

• 1 large red onion, thinly sliced
• 1 cup water
• ½ cup apple cider vinegar (or white vinegar)
• 1 tablespoon sugar
• 1 ½ teaspoons salt
• Optional flavor add-ins:
  • 1 garlic clove, sliced
  • ½ teaspoon whole black peppercorns
  • ½ teaspoon mustard seeds
  • A few sprigs of fresh herbs (thyme, oregano, cilantro, or dill)
  • A slice of jalapeño or chili flakes (for heat)

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🍴 Instructions:

1. Prepare the onion:
   Peel and slice the red onion thinly (use a sharp knife or mandoline for even slices).
2. Make the brine:
   In a small saucepan, combine water, vinegar, sugar, and salt.
   Heat over medium until the sugar and salt dissolve (about 1–2 minutes).
   Remove from heat.
3. Pack the jar:
   Place the sliced onions in a clean glass jar. Add optional flavorings (garlic, peppercorns, herbs, etc.) if using.
4. Pour the brine:
   Carefully pour the hot brine over the onions, making sure they’re fully submerged.
   Press them down with a spoon if needed.
5. Cool and store:
   Let the jar cool at room temperature (about 20–30 minutes).
   Seal and refrigerate.

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