Haricot Bean Soup

Ingredients

 * 1 	onion, chopped
 * 1/2 	ounce unsalted butter
 * 1/2 	ounce whole-wheat flour
 * 25 	fluid ounces milk
 * 1 	vegetable stock cube, crumbled
 * 1 (14 	ounces) can haricot beans, drained
 * 1 	tablespoon fresh parsley, chopped
 * 2 	tablespoons sour cream

Directions
Sauté the onion in the butter until soft. Stir in the flour and cook for 1 minute. Blend in the milk and sprinkle in the stock cube. Heat gently, stirring continuously, until the soup thickens, boils and is smooth. Stir in the beans and parsley and heat through. Just before serving, stir in the sour cream.