3 tablespoons butter
1 medium onion, diced (about 1 1/2 cups)
1 Idaho potato (about 3/4 pound), peeled and cut into 1/2-inch dice (a scant 2 cups diced)
10 stalks celery, trimmed and cut into 1/2-inch slices (about 6 cups sliced)
5 cups homemade chicken stock or good-quality purchased chicken broth
1/4 teaspoon sea salt
1/8 teaspoon freshly ground white pepper
2 tablespoons heavy cream (optional)
Celery leaves for garnish
Melt the butter in a soup pot. Add the onions and cook over medium heat until translucent, about 7 or 8 minutes.
Add the potato, celery, and chicken stock or broth. Bring to a boil, then reduce the heat and simmer until the potatoes and celery are very tender, about 20 minutes.
Puree in a food processor or blender (you'll need to do this in two or three batches), then pass the soup through a medium sieve, pressing the solids with the back of a wooden spoon.
Pour into a clean pot, add the salt and pepper to taste, then stir in the cream, if desired. The soup may be kept warm on low heat until ready to serve. Cut the celery leaves into chiffonade and garnish the soup before serving.
Yield: 4 servings
Each serving: 212 calories; 8 grams protein; 24 grams carbohydrates; 3 grams fiber; 11 grams fat; 6 grams saturated fat; 23 mg. cholesterol; 275 mg. sodium.