Heat oil in a large heavy saucepan over low heat. Add onions and cook, stirring, for 5 minutes. Add celery, bell pepper, garlic and cumin; cook, stirring, for 2 to 3 minutes. Add broth, thyme and bay leaf and bring to a boil. Reduce heat to low and simmer, uncovered, for 10 minutes.Advertisement
Add corn and potatoes, return to a simmer and cook until all the vegetables are tender, 5 to 10 minutes. Place cornstarch in a small bowl, slowly add evaporated milk, stirring until smooth. Stir into the soup and return to a simmer. Cook, stirring, until thickened, about 2 minutes. Discard the bay leaf. Season with salt, pepper and cayenne.
1 1/2 starch, 1/2 fat-free milk, 1 vegetable