saute celery and onion in olive oil until tender in a sauce pan. Add potato, milk, corn pepper and bay leaf. Simmer 10 minutes or until the potato is done. With a slotted spoon, scoop out half the potato and corn and set aside. Remove and dispose of the bay leaf. Use an immersion blender to blend the remaining milk, potatoes and corn in the sauce pan. Return to the sauce pan the potato and corn that had been set aside. Add the fish to the pan and simmer about 10 minutes or until the fish is done. Stir often.