Lets see, what else do Americans eat? Pancakes? In Germany they're called Schmarrn, the difference being that when prepared in Germany or Austria, the cook will tear up the pancakes into bite sized pieces before serving, and they are usually served with fruit instead of syrup (which occurs in the US as well, just not as commonly). They are served for any meal, not just breakfast.
Typical breakfast of eggs / bacon or sausage / cooked potatoes / some kind of bread - same as in Germany (except that many will wash it down with a beer instead of coffee).
Typical lunches in Germany are sandwiches of some form or another, usually sliced meats and cheeses, sometimes served with a salad or soup. Same as the US.
Let's see, what else? Bagels? Yup, they're from Austria. Almost all of the common desserts in the US are also common in Austria and Germany (many were invented in Vienna, which was the culinary capital - as well as the music and art capital - of Europe for centuries).
Roasts? Yup, pork and beef roasts are common in German cooking. Crock pot dinners (also called "hot dish" or "casseroles") are also common German cooking. Kimba mentioned pork knuckles or pork feet - German in derivation, common in the US south. The "brown sauce" that is common as a dressing in the US is also derived from German sauces made from beef bones and stock. Horseradish is also a common dressing for meats and on sandwiches in both Germany and the US.
Matter of fact, pretty much the only thing mentioned that doesn't have a similar dish in Germany is salted cod, Germans prefer their fish fresh. But then again, I'd have to argue against salted cod even being common in the US - my wife loves it (having grown up on the coast) and has a hard time finding it anywhere away from the coast. Besides, that's just derived from Italian anchovies anyway, not American.
Hot dogs and hamburgers are German Wiener Wuerstchen and Frikadellen served on rolls so that plates are not needed. Roasted poultry of all forms are also common in German cooking as well as the US.
And to top it all off, whenever someone mentions cabbage, the first country's cuisine I think of is Ireland, not Germany. And then Korea next. Both the Irish and Koreans eat much more cabbage than Germans.