Sparkling Panakam

In a medium pitcher, make a thick paste by stirring together the sugar, ginger, cardamom, lime juice, salt, and a small splash of the sparkling water. Stir until any lumps have dissolved. Add more water, a little at a time, stirring all the while. The mixture will get quite fizzy, so just take it slow. Serve as cold as possible with as many ice cubes wedged into the pitcher as possible.