Peel and wash the potatoes, carrots and kohlrabi. Dice potatoes and kohlrabi. Cut carrots into slices. Clean the cauliflower, cut into florets and wash. Peel and finely dice onions. Grind the coriander seeds coarsely or crush them in a mortar
Heat the oil in a pot. Brown onions, potatoes and coriander seeds in it, season. Add about 1 1/2 l water, bring to the boil. Stir in broth
Add the cauliflower and carrots. Simmer everything for about 15 minutes. Add kohlrabi after 10 minutes and cook it
Roast pumpkin seeds. Wash coriander, chop. Season and serve the soup. Sprinkle with coriander and seeds