Heat a large saucepan over medium-high heat. Coat pan with cooking spray, and add vegetable seasoning blend; cook 5 minutes or until tender. Stir in taco seasoning; cook 1 minute, stirring constantly.
. Add broth and next 4 ingredients; bring to a boil. Cover, reduce heat, and simmer 15 minutes, stirring occasionally. Ladle into bowls, and top with sour cream and cilantro.