Deep Dish Leftover Turkey Pot Pie

Ingredients

• 4 tablespoons butter, separated
• 1 medium onion, finely chopped
• 2 medium celery ribs, finely sliced
• 2 medium carrots, finely sliced
• 5 ounces mushrooms, sliced
• 3 garlic cloves, minced
• 3 cups turkey meat, diced
• 1 cup frozen corn
• 1 cup frozen peas
• 2 -3 cups turkey gravy
• 1 tablespoon fresh parsley, chopped
• 1 tablespoon fresh sage, finely chopped
• 4 cups mashed potatoes, room temperature
• 1/2 cup milk, warmed
• salt, Smokey Seasoned Salt
• ground pepper
• 2 pie crusts