1. Heat the oil in a pot over medium flame. Sauté onion for 2-3 minutes, add garlic, and sauté both until golden.
2. Add the chicken pieces and sauté until white.
3. Add mushrooms and sauté for 3 minutes.
4. Add grated potato and stir.
5. Add wine, stock or water, seasonings, and soy sauce. Bring to a boil and cook for 25 minutes on a low flame.
6. Taste, adjust seasoning, and add herbs. Remove from heat but leave the pot covered for another 5 minutes.