Hearty Potato Soup
["6 medium potatoes, peeled and cubed", "2 carrots, diced", "6 celery stalks, diced", "2 qt. water", "1 onion, chopped", "6 Tbsp. butter or margarine", "6 Tbsp. all-purpose flour", "1 tsp. salt", "1/2 tsp. pepper", "1 to 1 1/2 c. milk"]
["In a large kettle, cook potatoes and celery in water until tender (about 20 minutes).", "Drain; reserve liquid and set veggies aside."]
["potatoes", "carrots", "celery stalks", "water", "onion", "butter", "flour", "salt", "pepper", "milk"]