Brattens Clam Chowder
["1 c. onions, finely chopped", "1 c. celery, finely chopped", "2 c. finely diced potatoes", "2 (6 1/2 oz. each) cans minced clams and juice", "3/4 c. butter", "3/4 c. flour", "1 qt. half and half", "2 Tbsp. red wine vinegar"]
["Place onions, celery and potatoes in saucepan.", "Drain juice from clams and pour over vegetables.", "Add enough water to barely cover vegetables and simmer, covered, over medium heat, until barely tender."]
["onions", "celery", "potatoes", "butter", "flour", "red wine vinegar"]