Sos pwa (bean sauce)

Instructions

1. Soak the beans overnight in cold water, then drain and rinse them.
2. Cook the beans in 1 litre of water for 45 minutes over medium heat, until very tender.
3. In a frying pan, sauté the chopped onion, garlic and celery in the oil for 5 minutes.
4. Add the cooked beans with a little of their cooking liquid, the thyme, salt and the whole pepper, then mash everything together.
5. Simmer for 10 minutes, stirring, then remove the pepper, adjust the seasoning and serve.