Bratten's Clam Chowder

It wouldn't be the holidays without making this at least once! Love this recipe!!!

1 cup finely chopped onions
2 cups finely diced potatoes
1 cup finely diced celery
2 small cans minced clams and juice
1 ½ sq. butter
1 qt. half and half
¾ cup flour
Pepper
1 ½ tsp salt
2 T. red wine vinegar

Drain the juice from the clams and pour over the vegetables in a very small saucepan; add enough water to barely cover. Simmer, covered, over medium heat until barely tender.
In the meantime, melt butter, add flour and blend. Cook, stirring constantly. Add half and half and cook and stir with wire whisk until smooth and thick (this is important!!!) Add undrained veggies, clams and vinegar, and heat thoroughly. Season with salt and pepper to taste.