Melt a knob of butter in a small Frying pan.
Drop a tablespoon of discarded sourdough starter in and mush it around to flatten as best you can.
Fry gently and when browned on the underside, sprinkle a little sugar on top, flip and continue on other side.
When almost ready, throw in a few blueberries or whatever fruit you have to hand to warm in the butter.
Serve - maybe with icecream or cream if you have some.