Soak the beans in plenty of water overnight. Peel onions and dice them coarsely. Peel garlic and chop finely. Clean, wash and cut the chillies into rings. Pour beans into a sieve and drain well.
Heat the oil in a large casserole, add the meat and fry over a high heat while turning. Add the onions, garlic and chilli and fry briefly. Season with oregano, cumin, salt, pepper and sugar. Add tomato paste, sauté briefly, deglaze with stock and tomatoes.
Add the beans, bring to the boil, cover and stew for about 1 3/4 hours, stirring several times. For the topping, wash parsley, shake dry and chop finely. Clean, wash and finely dice the radishes. Clean and wash spring onions and cut into fine rings. Wash limes thoroughly, grate dry and cut into slices.
Mix radishes, spring onions and parsley. Pour the corn into a sieve and drain. Season goulash with salt and pepper again. Add corn, heat briefly. Sprinkle with some topping. Garnish with slices of lime. Garnish with oregano, spring onion and radish. Add the rest of the topping.