Potato, leek and celery root soup vote now Main DishVery Easy45 min Send this recipe to a friend Print this page Ask a question to the author Post your photo of this recipe Ingredients 4 4 tablespoons butter 4 cups thinly sliced leeks 1 celery root 4 cups chicken broth 3 medium red potatoes Salt to taste 1 sprig fresh thyme celery seeds View the directions