If you want you can cook the sauerkraut for about 15 minutes so that it becomes softer, but uncooked sauerkraut is also very tasty and crispy!
Cut the onion into half rings and stirfry in a little oil until lightly browned. Cut the pickles and wash the lettuce.
Heat the grill pan or BBQ and grill the sausages in approx. 8 minutes until brown and cooked.
Cut the baguette in half and grill the inside in the grill pan or BBQ, cover with mustard and put leaves of lettuce on it. Eventually add the sausage.