Phyllo Turkey Pot Pie

Name: Phyllo Turkey Pot Pie
Prep time: 45 min
Cook time: 50 min
Total time: 1 h 35 min
Yield: 8
Ingredients: 2 tbsp Chicken demi-glace; 8 cups Turkey, cooked; 1 Bay leaf; 4 Celery stalks; 1 lb Cremini mushrooms; 1 bag Pearl onions, frozen; 8 oz Potatoes, small red; 2 tsp Tarragon, fresh; 1 tbsp Thyme, fresh; 1 Yellow onion, large; 7 cups Chicken stock; 1 1/8 cup All-purpose flour; 1 Kosher salt and freshly ground pepper; 14 tbsp (1 3/4 sticks) (7 oz./220 g) unsalted butter, unsalted; 1/3 cup Madeira