The roots are cleaned and cut into strips.Put on to cook the peas. You can in the same water in which it was soaked, you can pour fresh water. I poured fresh water. Once in the pan add the chopped parsley root and celery. Bring to a boil, reduce the heat to low, do not add salt! Cook until peas are ready. Cooking time depends on the varieties of peas, and the time of soaking. Try. In principle, my opinion - peas can not be digested, especially for soup. I cook for 1.5 hours.