Chicken wash. Peel onion. Boil the chicken in 1 1/2 litres of water. Add onion, bay leaf, peppercorns and salt. Let simmer for about 1 1/2 hours at low heat. Cook rice in 400 ml boiling salted water for 15-20 minutes.
Clean and wash the vegetables. Cut celery and zucchini into slices, tomatoes into eighths. Remove chicken from broth and pour broth through a sieve. Remove skin from chicken, remove meat from bones and cut into bite-sized pieces.
Bring the stock to the boil again. Add vegetables and cook for about 8 minutes. Press the sausage meat as small dumplings out of the skin and add it to the soup with the chicken meat. Heat up again for about 2 minutes.
Season soup again. Cut basil leaves into strips and fold into the rice. Add basil rice to the soup.