How to Bake Chicken Pastry with Flaky Crust

Ingredients

• 2 ½ cups all-purpose flour
• 1 cup unsalted butter, cold and cubed
• 1 teaspoon salt
• 1/4 cup ice water
• 2 cups cooked chicken, diced
• 1 cup mixed vegetables (peas, carrots, corn)
• 1 cup onion, finely chopped
• 2 tablespoons olive oil
• 1 teaspoon garlic, minced
• 1 teaspoon dried thyme
• 1 teaspoon dried rosemary
• Salt and pepper to taste
• 1 large egg, beaten (for egg wash)