1lb.bonelessskinless chicken breasts, trimmed, cut into 3/4-inch pieces
1 14- to 16-ouncepackage frozen broccoli floretsthawed and chopped, if desired
1 1/2cupsskim milk
1/2cupreduced-fat mayonnaise
3tablespoonsall-purpose flour
1 1/2teaspoonsdry mustard
1/2teaspoongarlic powder
1/4teaspoonsalt
1/4teaspoonfreshly ground pepper
1 1/2cupsshredded Colby-Jack or Cheddar cheese
Instructions
Place noodles in a large skillet. Pour broth over the noodles. Layer chicken, then broccoli over the noodles.
Whisk milk, mayonnaise, flour, dry mustard, garlic powder, salt and pepper in a medium bowl. Pour over the broccoli.
Bring to a simmer over medium-high heat. Reduce heat to maintain a simmer, cover and cook, stirring once or twice, until the noodles and chicken are cooked through, 15 to 18 minutes.
Meanwhile, position rack in upper third of oven; preheat broiler. When the casserole is done, sprinkle cheese on top and broil until lightly browned, about 3 minutes.