Chicken Divan Casserole

Place chicken breasts into a large pot and cover with water; bring to a boil. Cook until chicken is no longer pink in the center and the juices run clear, about 10 minutes. An instant-read thermometer inserted into the center of a breast should read at least 165 degrees F (74 degrees C). Remove chicken from the water.

Place a steamer insert into a saucepan and fill with water to just below the bottom of the steamer. Bring water to a boil. Add broccoli, cover, and steam until tender, 3 to 6 minutes. Chop broccoli.

Preheat oven to 350 degrees F (175 degrees C).