Cream of Tomato Soup

Ingredients

• 2 cups cold milk
• 2 1/2 cups canned tomatoes
• 1 small onion, chopped
• 3/4 tsp. salt
• 1/8 tsp. pepper
• 1/2 tsp. celery salt
• 1 tsp. sugar
• 3 tblsp. flour
• 2 tblsp. butter or margarine