Soak the beans overnight in 1.25 litres of cold water
Peel onions and garlic and cut into strips. Clean, wash and slice the celery. Peel and wash the carrots, cut them in half lengthwise and cut them into pieces. Remove chorizo from the skin and cut into slices
Heat the oil in a frying pan. Fry the Nürnberger in it for 3-4 minutes, turning. Add the chorizo and fry for another 3-4 minutes, turning over. Add onions, garlic, celery and carrots to the hot frying fat, fry for 4-5 minutes, turning over. After 3-4 minutes add tomato paste, roast a little. Take everything out. Put the beans together with soaking water (approx. 700 ml) into the roaster, cover and simmer for approx. 1 hour until the beans are soft.
Add sausages and fried vegetables, bring to the boil, season with salt and pepper. Remove the roaster from the stove, sprinkle with breadcrumbs and cover with butter flakes
Bake in the preheated oven (electric range: 225 °C/ convection oven: 200 °C/ gas: level 4) for 10-15 minutes until brown
Waiting time approx. 12 hours