Ingredients

• 2 ½ pounds leeks
• 1 (4 pound) whole chicken
• 1 large bay leaf
• 3 cloves garlic, halved
• 4 medium pitted prunes
• 3 quarts cold water, or more as needed
• ¼ cup uncooked white rice
• 1 tablespoon kosher salt, or more to taste
• freshly ground black pepper to taste
• 1 teaspoon fresh thyme leaves