Peel and finely dice the onions and garlic. Clean, wash and finely dice the peppers. Clean chillies, carve lengthwise, remove seeds, wash and cut into thin rings.
Boil up beer, 400 ml water, onions, garlic, paprika and chillies. Stir in broth and simmer covered for about 5 minutes.
Wash coriander, shake dry, pluck leaves from the stems. Finely puree vinegar and coriander with a hand blender, except for a little for garnishing.
Pour the beans into a sieve and rinse with cold water. Add beans and coriander puree to the soup, bring to the boil and simmer for about 10 minutes.
Season soup to taste with salt, 1/2 tsp. oregano, 1 tsp. paprika and lime juice. Arrange white chili and garnish with remaining coriander leaves. Roasted tortilla flat cakes taste good with it.