Vichyssoise

Ingredients

• 1 tablespoon olive oil
• 4 leeks, trimmed, washed and sliced (white and pale green portions)
• 1 small onion, chopped
• 4 medium-sized baking potatoes, peeled and cut into 1/2 inch pieces
• 4 cups homemade chicken stock, or low-sodium, organic chicken stock
• 2 tablespoons white flour
• 1/2 cup milk or cream
• sea salt and/or ground white pepper
• fresh chives, chopped (optional)