Easy Chicken Pot Pie Recipe

Ingredients

• 8 tablespoons (1 stick) unsalted butter, sliced
• 1 medium (1 1/2 cups) white onion, diced
• 3 stalks (1 1/4 cups) celery, diced
• 3 cloves garlic, minced
• 1/2 cup all-purpose flour
• 3 cups chicken stock
• 1/2 cup whole milk
• 1 rotisserie chicken
• 2 cups (about 8 ounces) frozen peas and carrots blend, thawed and drained of excess water
• 1 1/2 teaspoons fresh rosemary, stems removed and roughly chopped, or 3/4 teaspoons dried rosemary
• 1 1/2 teaspoons fresh thyme leaves, stems removed or 3/4 teaspoons dried
• 1 1/2 teaspoons fresh sage, roughly chopped or 3/4 teaspoons dried
• 1/2 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 1 sheet of puff pastry, thawed under refrigeration
• 1 large egg yolk
• 1 tablespoon cold water
• Salt, optional