Soak the beans in cold water overnight. Pour the beans into a sieve. Rinse with cold water, place in a large pot, fill up with water and bring to the boil. Skim off any foam with a skimmer. Peel garlic and cut into fine cubes.
Add garlic to the beans. Simmer the beans for 1 1/4-1 1/2 hours until the beans are soft. Wash sage, shake dry and pluck leaves from the stems. Add half of the sage to the beans about 30 minutes before the end of the cooking time and season with salt and pepper. Heat the oil in a pot. Prick the sausages several times with a fork and fry them all around for about 5 minutes until brown. Add the remaining sage to the pot and fry for about 1 minute. Add the tomatoes, chop a little and simmer covered for about 10 minutes. Drain the beans, collecting approx. 200 ml cooking liquid. Put the beans into the sausage pot and continue cooking for 7-8 minutes.
Prick the sausages several times with a fork and fry them all around for about 5 minutes until brown. Add the remaining sage to the pot and fry for about 1 minute. Add the tomatoes, chop a little and simmer covered for about 10 minutes. Drain the beans, collecting approx. 200 ml cooking liquid. Put the beans into the sausage pot and continue cooking for 7-8 minutes. Dilute with approx. 150 ml of collected cooking liquid, bring to the boil again and season to taste with salt, pepper and a little sugar. Delicious with baguette or ciabatta
12 hours waiting time