Cut chicken into bite size pieces and place in Dutch oven. Shake on herbal seasoning mixture, add mushrooms and pour in 1/2 cup milk.
Layer on cheese.
Cover and bake at 350° for 10 to 15 minutes.
Remove pan from oven and add croutons that have been soaking in beaten egg, milk, bouillon and Parmesan cheese mixture. Distribute croutons evenly to keep in moisture and make a crust. Return to oven without lid.
Bake about 45 minutes or until croutons are nicely browned.