1
: Preheat oven to 350°F (180°C). Grease a 9” x 13” (3L) baking dish.
2
: Cook noodles in a large amount of boiling salted water for 3 minutes. Add broccoli and continue cooking for an additional 3 minutes. Drain well and place on bottom of prepared baking dish.
3
: Heat butter in a medium saucepan over medium heat. Add onions and mushrooms and cook for 5 minutes. Add flour and cook for 3 minutes. Add chicken stock and evaporated milk. Cook, stirring frequently until mixture has thickened. Stir in mustard and chicken. Pour over noodles. Sprinkle with cheese and breadcrumbs.
4
: Bake in preheated oven 40-45 minutes or until bubbling.