1 russet potato (1/2 lb.), peeled and thinly sliced
Plain nonfat yogurt
How to Make It
Pour red peppers with juice into a 2- to 3-quart pan. Add broth, onion, and potato. Boil gently, covered, until potato begins to fall apart, about 20 minutes. Purée soup in a blender or food processor, reheat if necessary, then ladle into bowls. Add yogurt and salt to taste.