Rinse beans and drain well. Peel onions and garlic. Clean and wash the peppers. Dice onions, garlic and bell peppers very finely.
Heat the oil in a large pot. Brown the onions, garlic and paprika. Add the beans. Deglaze with about 3/4 l water and bring to the boil. Stir in broth and marjoram. Simmer covered for about 15 minutes.
Wash the coriander, remove the leaves and put some aside for garnishing. Finely chop the rest.
Season the bean pot with sweet paprika, vinegar, salt and sugar. Stir in coriander. Arrange and garnish with coriander.