Bitter-Sweet Pickled Red Onions

Ingredients:
2 medium red onions, thinly sliced

1/2 cup apple cider vinegar (or white vinegar)

1/4 cup water

2 tablespoons sugar (you can adjust based on desired sweetness)

1 teaspoon salt

1/2 teaspoon mustard seeds (optional for extra flavor)

1/4 teaspoon black pepper

1/4 teaspoon red pepper flakes (optional for a bit of heat)

1 clove garlic, smashed (optional for a deeper flavor)

A small sprig of fresh thyme or a few coriander seeds (optional for added aromatics)

Instructions: 

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