Bock sausage is a typical snack that is usually served with a piece of toast or bread roll. Bock sausage is thicker and shorter than a Wiener sausage. So that the skin of the Bock sausage does not burst open during heating, it is only heated, but not boiled. Pour the water into a saucepan, cover with a lid and bring the water to the boil. Remove the lid and switch off the stove. Put the Bock sausage in the hot water and let it steep for 5 minutes. Serve Bock sausage with mustard.