Preheat the oven to 350 degrees F. Cook the broccoli according to the package directions until just tender. Drain well.
Butter a 2-quart casserole dish. Arrange the broccoli in the casserole and squeeze the lemon over the broccoli. Place the chicken on the broccoli. Combine the mushrooms, soup, sour cream, and sherry. Pour over the chicken. Sprinkle generously with paprika. Bake, uncovered, for 1 hour. Serve hot.
This is the dish that is credited with introducing Americans to broccoli in the 1930s. You can’t go wrong with this popular combination of chicken, mushrooms, and broccoli in a creamy rich sauce. It’s especially good served with noodles.