1. Peel the potatoes, cut them into small cubes.
2. Peel the shallot and garlic.
3. Cut the celery leaves, set them aside, wash the stalks, remove the strings, and cut the stems into small pieces.
4. Heat the oil, sauté the celery and potatoes for a few minutes.
5. Add the finely minced garlic and shallot, mix and cook for about twenty minutes, stirring often to prevent the vegetables from sticking.
6. Add a little water towards the end of cooking, cover and heat for a few more minutes if necessary; the vegetables should remain slightly crunchy.
7. Serve.