Wash hands with soap and water.
Place chicken breasts on microwave safe plate with thickest portion to the outside. Cover loosely with plastic wrap. Do not rinse raw poultry.
Wash hands with soap and water after handling uncooked chicken.
Cook on high for 4 minutes until the internal temperature reaches 165°F on food thermometer.
Cut cooked chicken into about 1-inch cubes.
Preheat oven to 350°F. Grease a 11 X 7-in. baking dish.
Prepare stuffing mix according to package directions, using 1-½ cups water.
In large bowl, combine cooked chicken, broccoli and soup, and transfer to the greased baking dish. Top with stuffing; sprinkle with cheese.
Cover and bake for 20 minutes. Uncover; bake 10-15 minutes longer. Cook until internal temperature reaches 165°F on food thermometer.