You see them in front of concert halls, at sporting events, and at just about every festival and celebration in Germany: stands selling crispy, crunchy bratwurst sausages. The smell alone tempts many people to grab a quick bite to eat before, during, or after the event.
Bratwurst is best served in a bun or on a paper plate with salted French fries. Mustard and ketchup are, of course, essential accompaniments.
Incidentally, the type of sausage that ends up on the grill varies from region to region. However, the thick Thuringian Rostbratwurst and the narrow, thin Nuremberg Bratwurst are particularly popular. If you want to buy a food truck and attract a broad customer base, you should have at least one of these two on your menu.