Ingredients for 4 people:
White beans (dried,soaked the night before): 300 gr.
three tablespoons of olive oil
two cloves of garlic
a few sage leaves
In a bottle of clay you put the beans and three tablespoons of olive oil, the garlic, sage and so enough water to fill 3/4 fiasco. Salt should be added halfway through cooking.
The flask is closed with a cap of clay that filters the steam and is placed on the charcoal fire (it would be better in a wood oven after baking bread) taking care that the liquid in the flask does not boil ever. He just needs to simmer continuously for 5 or 6 hours.