Corn tortillas provide this soup with both its flavor and texture. It's a fast-growing favorite in the Southeast. I especially like this recipe because it can be made quickly and easily and it can serve as an appetizer or a main dish.
Place the tomatoes, onion and garlic in a blender; cover and process until smooth. Transfer to a large saucepan. Add chicken broth and seasonings. Bring to a boil. Reduce heat; simmer, uncovered, for 3 minutes.
Meanwhile, cut tortillas into 1/4-in. strips; fry in hot oil until crisp and brown. Drain on paper towels. Ladle soup into bowls; top with tortilla strips, sour cream and cheese.