Ingredients

• 4 tablespoons butter or extra virgin olive oil
• 1 medium yellow onion, chopped small
• 2 carrots, peeled and chopped into 1/2-inch pieces
• 2 celery stalks, chopped into 1/2-inch pieces
• 2 teaspoons dried thyme
• 2 tablespoons all-purpose flour
• 3 1/2 cups low-sodium chicken stock
• 1 tablespoon sherry or Madeira
• 1 cup frozen green peas
• 1 pound cooked chicken, cut into bite-size pieces
• 8 ounces frozen puff pastry, thawed

Serves 4 to 6