What authentic food to eat in germany?

To tell you the truth, there is no authentic German food in all over Germany. Germany consists of 16 federal states which have been independent until almost the end of the nineteenth century (1871) and therefore have developed a regional cuisine which varies from state to state. In general you will get the standard dishes like "Schnitzel" a bone-less slice of meat of pork or of veal as "Wiener Schnitzel" or various types of "Bratwurst" a sausage composed of pork, beef or veal. Several type of stew kind soups like "Erbsensuppe" (pea soup), "Bohnensuppe" (bean soup), "Linsensuppe" (Lens soup), "Kartoffelsuppe" (potatoe soup), often served in winter-time or at fun fairs or marksmen's festivals as main course which consists also patatoes, meat, bacon and is served with sausages (Frankfurters) and bread or cobs. Field or mobile kitchens are often used for that purpose. Some northern German dishes are "Aalsuppe" (Eelsoup which actually does not contain any eel but stands for "all what's ...  more