Ingredients
Directions
1.
COOK spaghetti until firm but not soft (al dente); DRAIN; PLACE in a greased 11-inx 7-inx 2-inbaking dish; TOP with chicken; SET aside.
2.
In a large skillet, SAUTE mushrooms and onion in butter until tender.
3.
WHISK in the soup, milk, and mustard until blended.
4.
STIR in the cheddar cheese; COOK, STIRRING frequently, over medium heat until cheese is melted.
5.
POUR mixture over chicken; SPRINKLE with Parmesan and mozzarella cheeses.
6.
BAKE, uncovered, at 350° until heated through and cheese is melted, about 25-30 minutes.