Spicy Black Bean Soup - Diet Recipe

Ingredients

• 1 cup chopped onion
• 1 cup chopped celery
• 1 cup chopped carrots
• 2 cups cooked black beans
• 2 cups vegetable broth
• 1 cup water
• pinch cayenne pepper
• ½ tsp. cumin
• ½ tsp. dried oregano
• 6 Tbsp. nonfat sour cream