Coat a 4-quart Dutch oven with nonstick cooking spray. Preheat over medium for 1 minute. Add onion and leek; cook 5 minutes until tender, stirring occasionally.
Add corn; cook 5 minutes or until corn softens, stirring occasionally. Add one can of the chicken broth. Bring to boiling; reduce heat. Cover and simmer 20 minutes or until corn is very tender. Remove from heat and cool slightly.
Transfer half the corn mixture to a blender or food processor; cover and blend or process until smooth. Return pureed corn mixture to Dutch oven.
Add remaining broth, the sweet pepper, 1/8 tsp. black pepper, cayenne pepper, and saffron. Heat through. Top with snipped fresh chives and/or additional ground black pepper. Makes 6 (1-1/3-cup) servings.