Germans don't eat sausage, sauerkraut and potatoes all the time. Here are some of the lighter dishes they'll typically prepare during the summer. (You can still expect a few sausages and potatoes, though.)
"Breakfast like a king, lunch like a prince, and dine like a pauper" is an old adage in Germany.
The German tradition of "Abendbrot," which literally translates as "evening bread," is a very attractive option during the summer, as no cooking is involved. Instead of a big meal, a typical Abendbrot is made up of a selection of cheeses, cold cuts or sausage, and pickles served with slices of dark bread. Add a beer or an "Apfelschorle" (apple juice mixed with carbonated mineral water) to your meal, and you'll definitely be doing it the German way.
Otherwise, the classic German summer dishes presented in the gallery above are also easy to prepare. Don't be fooled, simplicity can be very addictive.