Clean, peel, wash and slice the parsnips and carrots. Melt the butter in a wide saucepan and briefly sauté the parsnip with the carrot slices. Then dust with the flour and sweat. Pour in the vegetable stock and milk and simmer for about 5 - 8 minutes while stirring.
Rinse the parsley, shake dry, chop finely and add. Season the vegetables with a little salt, pepper and a little nutmeg.