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Easy
Published 2007
This is a classic. I serve it in sugar-frosted glasses. My mother-in-law uses Persian bottled lime juice, which is very strong and pure having merely been pasteurized – but I prefer to use fresh.
Heat the water and sugar together in a pan until the latter is all dissolved. Add the lemon (or lime) and zest, and heat gently for around 10 minutes more. Leave to cool, bottle and seal.
