In 1994 I was diagnosed with celiac disease, which led me to create Celiac.com in 1995. I created this site for a single purpose: To help as many people as possible with celiac disease get diagnosed and living happy, healthy gluten-free lives. Celiac.com was the first site on the Internet dedicated solely to celiac disease, and since then it has become an invaluable resource to people worldwide who seek information about celiac disease and the gluten-free diet. In a large, heavy saucepan, heat oil and sherry or water until bubbling. Add onion and sauté 5 minutes, stirring frequently to prevent browning.(If mixture appears dry, add 1 to 2 tablespoons water.) Add carrot, celery, bay leaf, potatoes and stock. Cover pan, bring to a boil and cook over medium heat 10 to 15 minutes, or until potato is tender. Add milk and corn and simmer 3 minutes, or until corn is tender.
Discard bay leaf. Puree 1 cup soup in a blender, then return to the pot. Season with cayenne. If desired, garnish with a dollop of nonfat yogurt. Serves 4.