Sirka Pyaz (Indian Pickled Vinegar Onions) is an Indian condiment that is a great accompaniment to any North Indian-style meal. Here is how to make it at home.
Add water, beetroot, sugar, cloves, green cardamoms, cinnamon stick, and black cardamom to a saucepan.
Bring the mixture to boil over high heat.
Reduce the heat to low and simmer the mixture for 2-3 minutes.
Add pearl onions to a non-reactive jar (a glass jar is preferable). Pour white vinegar, salt, and the water mixture that you made earlier over the onions and stir gently.
Cover the jar and refrigerate it. Use the onions after 24 hours for up to 10 days.