Wash the cauliflower and break it up into florets. Peel the garlic clove.
Add the apple cider vinegar, water, salt, and sugar to a small saucepan. Heat until salt and sugar have completely dissolved.
Add the cauliflower florets and the garlic clove to a 750 ml (25 ounces) glass jar. Pour the vinegar brine on top and add in the curry powder and turmeric. Make sure the florets are completely submerged and close with a lid.
Let cool until it reaches room temperature. Place it in the refrigerator overnight or for at least 20 minutes before serving.
Notes
More pickling spices you can add include cumin seeds, coriander seeds, mustard seeds, red pepper flakes, and bay leaves.
Quick pickled cauliflower will last for at least 2 weeks and up to 4 weeks in an airtight container in the refrigerator. Make sure the cauliflower florets are constantly submerged in pickling liquid.