Soak the lentils in 1.2 liters of water for 3-4 hours.
Then put in a pressure cooker, add diced onions, cloves, bay leaf, pork belly and a pinch of salt. A good sip of red wine vinegar with it. Let the whole thing cook in the pressure cooker for about 30 minutes. (It takes about an hour in a normal pot.)
Meanwhile, for the sparrows, dice the roll and mix with the flour, eggs, milk and a pinch of salt to form a dough. Then put the sparrows in boiling water with a medium-sized spoon and simmer for about 10 minutes.
After opening the pressure cooker, cut the pork belly into cubes. Put the roux in a small pan with a sip of olive oil and a tablespoon of flour and add to the stew. Bring it to the boil again briefly and season a little with vinegar and salt.