Sauté onion, carrot, celery, and garlic in oil in large saucepan 3-4 minutes. Add chicken broth and beans; heat to boiling reduce heat and simmer until vegetables are tender, 5-8 minutes. Process soup in food processor or blender until smooth. Serve in bowls; sprinkle with chives or parsley. Note: you can substitute frozen onion and prepared chopped garlic; to save preparation time, chopped baby carrots may be used. You can make soup 1-2 days in advance; refrigerate covered. Courtesy American Dry Bean Board.
Preheat oven to 350° F. Combine all ingredients in a casserole. Bake, uncovered, for 55-60 minutes.