Old-fashioned pickled onions.

Quick-pickled sliced red onions have become a favourite topping for burgers, sandwiches and salads, but they're a world away from the old-fashioned pickled onions many South Africans remember buying with fish and chips.

Those small, crisp onions with their sharp vinegar bite are easy to make at home and, with a little patience, taste even better after a week in the fridge.

This old-fashioned pickled onions recipe uses small white pickling onions, the variety sold specifically for preserving.

If you're following an overseas recipe, you'll often see them called pearl onions, but locally they're generally sold as pickling onions.