Cook the peas in a little stock. Clean the leek, cut lengthwise, wash thoroughly and cut into slices. Peel and wash the potatoes and cut them into pieces. Melt butter in a pot. Add leek rings and potato pieces while stirring and fry lightly. Pour in broth and simmer covered over a low heat for 15 minutes.
Season to taste with salt, pepper and nutmeg. Remove some pieces of leek. Puree the soup with the chopping stick. Add the cooked peas and leek pieces and stir in the cream. Wash parsley, dab dry and chop finely. Arrange the soup, sprinkle with the chopped parsley and coarse pepper