Melt butter with olive oil over medium heat.  Add carrots, celery, garlic and onion, cook until tender apx. 5. min. Pour broth over vegetables.  Add seasonings and spices. Let simmer for about 10-15 minutes to continue to tenderize vegetables.  Add pasta and chicken, simmer an additional 20 minutes or until pasta is cooked.  Remove bay leaf before serving.An additional ingredient to add for a creamy soup is 16 oz. sour cream, added after the pasta is cooked, and simmer an additional 10-15 min. for the sauce to thicken.