Tereré
In Asunción the hottest part of the day stops for tereré: a horn or cup packed with yerba mate, topped up again and again with ice water infused with crushed herbs, and passed round the group through a metal straw. It was recognised by UNESCO as part of Paraguay's cultural heritage, and the herbs (yuyos) change with the season and the drinker's mood. Yerba mate contains caffeine, so it isn't one for small children. The common mistake is pouring water straight into loose yerba, which then clogs the straw; tilt the yerba to one side first. Chef's tip: for tereré ruso, swap the water for cold orange or grapefruit juice.













