In a 10-inch cast-iron skillet, melt butter over medium heat. Add potatoes, green beans, corn, carrot, onion, and celery; cook until vegetables are just soft, about 7 minutes.
In a small bowl, whisk together broth, half-and-half, and flour. Add mixture to skillet. Stir in parsley, 1¼ teaspoons salt, pepper, and thyme. Bring to a boil over medium-high heat, stirring frequently. Stir in chicken.
On a lightly floured surface, roll piecrust to a 12-inch circle. Place dough on chicken mixture, and crimp edges as desired. Cut 6 slits in top of dough to release steam. Place skillet on a baking sheet.
In a small bowl, whisk together egg and 1 teaspoon water. Brush dough with egg mixture, and sprinkle with remaining ¼ teaspoon salt.
Bake until crust is golden brown and filling is bubbly, about 40 minutes. Let stand for 15 minutes before serving.
Notes
Kitchen Tip: You can make the chicken filling up to 2 days ahead. When you’re ready to prepare the pot pie, simply reheat the filling in a skillet, top with piecrust, and bake.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/classic-chicken-pot-pie-recipe/