1 (2 pound) cauliflower, trimmed and cut into florets
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1 tablespoon minced garlic
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2 teaspoons crushed red pepper flakes
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1 teaspoon mustard seeds
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½ teaspoon whole black peppercorns
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2 cups distilled white vinegar
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2 cups water
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1 tablespoon sea salt
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1 teaspoon white sugar
Instructions
Place cauliflower florets into a large canning jar. Add garlic, crushed red pepper flakes, mustard seeds, and peppercorns.
Bring vinegar, water, sea salt, and sugar to a boil in a small saucepan over medium-high heat. Reduce heat and simmer until salt and sugar have dissolved, about 5 minutes.
Pour mixture over the cauliflower mixture, seal, and let cool for 1 hour.
Place jar in the refrigerator for 24 hours, shaking every 8 hours.