In 3.5 or 4 litre saucepan heat oil; add onions, green pepper, carrot, celery, and garlic and saute, stirring frequently, until vegetables are tender, about 2 minutes. Add remaining ingredients except fish and bring to a boil. Reduce heat and let simmer until flavors are blended, about 20 minutes; stir in fish and cook until fish flakes easily when tested with fork, 7-10 minutes. Remove bay leaf before serving. 1 serving!2 calories.