Deep-Dish Chicken Potpie

Ingredients

• 2 cups all-purpose flour
• 1/2 teaspoon salt
• 2/3 cup cold butter, cubed
• 6 to 8 tablespoons cold water
• 3 tablespoons butter
• 3 tablespoons all-purpose flour
• 1 cup half-and-half cream
• 1/2 cup chicken broth
• 1/2 teaspoon salt
• 1/2 teaspoon dried thyme
• 1/4 teaspoon pepper
• 2-1/2 cups cubed cooked chicken
• 2 cups fresh or frozen peas
• 2 medium potatoes, cut into 1/2-inch cubes
• 3 medium carrots, thinly sliced
• 1/4 cup chopped onion
• 1 teaspoon milk