Step 1: Gather the ingredients.

Step 2: In a large soup pot, bring water, split peas, pork belly or bacon, pork chop, and bouillon cube to a boil. Reduce the heat to a simmer, cover and let cook for 45 minutes, stirring occasionally and skimming off any foam that rises to the top.

Step 3: Remove the pork chop, debone, and thinly slice the meat. Set aside.

Step 4: Add the celery, carrots, potato, onion, leek, and celeriac to the soup. Return to the boil, reduce the heat to a simmer and let cook, uncovered, for another 30 minutes, adding a little extra water if the ingredients start to stick to the bottom of the pot.

Step 5: Add the smoked sausage for the last 15 minutes of cooking time. When the vegetables are tender, remove the bacon and smoked sausage, slice thinly and set aside.

Step 6: If you prefer a smooth consistency, purée the soup with a stick blender. Season to taste with salt and pepper. Add the meat back to the soup, setting some slices of rookworst aside.

Step 7: Serve in heated bowls or soup plates, garnished with slices of rookworst and chopped celery leaf.

Step 8: Enjoy!