Soak the dried beans in 2 liters of water and leave overnight or approximately 12 hours.
Rinse the beans briefly and cook in a pan with plenty of water for 1 hour until al dente.
Meanwhile, heat a little oil in a large soup pan over medium-high heat and fry the bacon bits until crispy. Remove them from the pan and drain on kitchen paper.
Add the onion, garlic and soup vegetables to the same pan. Sautée them until soft, about 5-7 minutes.
Add the thyme, bay leaf and paprika to the vegetables and fry briefly.
Add the brown beans and vegetable stock to the pan. Bring to the boil and simmer on low heat for 15-20 minutes.
Remove a quarter of the soup from the pan and mash it finely with a immersion blender, then return it to the pan and blend well.
Add the slices of smoked sausage and simmer the soup for another 10 minutes.
Remove the bay leaf and season the soup with salt and pepper.
Serve the soup in bowls, garnish with the fried bacon cubes and optional fresh celery leaves. Enjoy your meal!