Creamy Tomato Soup

Combine butter and onion in 2 quart glass microwave dish. Microwave on high for 2 minutes or until butter is melted. Add flour, sugar, salt and pepper, mix well. Stir in tomato juice gradually. Microwave on high 4 minutes or until heated through, stirring once. Stir in milk gradually. Microwave on medium high 8-10 minutes or just to the simmering point, stirring every 2 minutes.