1. Melt butter pan over medium heat.
2. Add mushrooms and onion and saute 7 or 8-minutes minutes.
3. Add the flour and stir till it turns light brown.
4. Gradually add broth, milk, and cream cheese while stirring
5. (Note: this has to be done when the pan is not on the gas).
6. After adding put in back on the gas & bring sauce to a slow boil and cook about 5-minutes.
7. Keep stirring or else lumps will be formed.
8. Remove from heat and stir in 2 tablespoons Mozarrella cheese, apple juice, salt, garlic powder and pepper.
9. Stir spaghetti and chicken into sauce.
10. Spoon contents into a deep, 3-quart casserole.
11. Sprinkle with 2 tablespoons Parmesan cheese.
12. Cover casserole, and bake at 350-F degrees for 20-minutes.
13. Continue to bake uncovered for 10-minutes.
14. Remove from oven and let stand 5 minutes before serving.

Note:
One can use Parmesan cheese instead of Mozarrella, choice is yours!