RECIPES > Vegetable Dishes - Fried French beans, Lyon style   An old recipe. Ingredients French beans Butter 1 or 2 onions A dash of vinegar Chopped parsley. Recipe Before putting the French beans in the hot butter in the frying pan, put in the onions cut finely in half rounds. Sweat them gently, then add the French beans and fry everything together. Check the seasoning. Arrange the French beans and onions in a deep serving dish. Put the frying pan back onto the heat and when it is hot take it off the heat and put in a dash of vinegar straight away. Pour the hot vinegar over the French beans and sprinkle with chopped parsley. Serve.