Its really popular over here, made with berries and thickened with potato flour. Never actually made it myself but the basic recipe would be berries and sugar and water boiled up then taken off the hob, mix in a couple spoons of potato flour (mixed in cold water first so it doesn't go lumpy) then back on the hob for a minute or so then its ready. My grandad's lady friend would make it constantly and give it to us to drink instead of juice!