Mint leaves, wash in cold water, drain in a sieve, place on a clean towel and gently blot. Then put them in a pan, pour 250 g of sugar. Pour the citric acid solution and stand under the lid closed for 6 hours, shaking occasionally.

Of the remaining cook sugar syrup, 0.5 glass of water, remove the foam and drain. Pour over the already empty juice mint leaves and leave for 6 hours to infuse. Then cook on slow heat for 5 minutes. Then pour into sterilized jars. Here's what happened...