Soak the beans overnight in cold water. Wash and clean the vegetables. Chop the onions, pepper, carrots and leeks finely. The faster option is just to blend them all together. Put them in a pot of water.
Add the dried pepper and saute under a lid on low heat until the veggies soften. At that point, add the tomato salsa, oil and paprika. The veggies and broth are now ready.
Rinse the beans and throw out the ones that have floated up. Put them in a suitable container with cold water, enough to cover them, on the stove.
Once the water reaches boiling point, discard it. Pour the beans in the clay pot. Pour the hot broth and veggies over them.
Put the lid on. Knead a ball of dough from the flour and water, seal the lid with it. Let it simmer on low heat about 1 1/2 - 2 hours.
Boil another 10 min.