Flammkuchen: just like pizza, only better
Until I moved here I associated the word Alsatian only with dogs. Usually big, teeth-baring dogs on the end of chains held by large armed men. In fact the word refers to an area of France around Strasbourg. This borderland between Germany and France has changed hands many times over the centuries, so it isn't surprising that its cuisine is a mixture of the two.
One of the specialties is the Flammkuchen, a very thin type of pizza traditionally covered in creme fraiche, bacon and onions. It's a killer meal and, in my mind, beats out the tomato-based Italian variant every time.
There are quite few places around Berlin which serve Flammkuchen and are well worth checking out. Combine it with some Federweise, an early wine available around September, if you get the chance. Trust me, you'll love it.