Also it seems thin like pizza.

I didn't know that was a used name, I would just call this fruit pie or fruit tarte.

Thank you, I’ll give it a try if I see one when I travel to Germany again.

C’est marrant, il y a une variété de prune qu’on appelle quetsche en français, mais je n’avais jamais réalisé que le mot venait de l’allemand ! Mais vu l’orthographe avec le “sch”, je ne suis pas surprise en fait. :-) C’est une prune dont la peau est violette et l’intérieur orange. Which region is your dialect from?

We also have Quetsche in France but it is one specific variety of longer oval plums that tipical of Alsace and Lorraine. Manteau of people doesn't make a difference though. They would call any purple plum of this shape "quetsche" but that is not that.