My favourite summertime drink when in Germany is Rhabarberschorle, a rhubarb spritzer. Here’s a bottle I enjoyed in 2011 in Berlin:

With rhubarb in season, I resolved to make some for myself. It’s really easy:

1. Cut some rhubarb up.
2. Place it in a little water in a pot and heat it on medium-high until it’s satisfyingly mushy.
3. Strain the juice out into a bottle.
4. Spritz up some soda water in the Sodastream and add the rhubarb juice to taste.

You can add sugar if you must, but I recommend you start without sugar, as rhubarb doesn’t really need it as much as you think it might.