Unbelievably easy. Relatively healthy.
Grease a large-ish casserole dish. Cut chicken breasts in half (either way, but I feel like they cook faster if you cut them into two thin, flat pieces through the middle) & place in the pan. Empty a bag or two of frozen broccoli into the pan. Sprinkle everything with a light dusting of ranch seasoning. Foil & fridge.
When time to cook, give it 45 mins or so (maybe more) at about 350-375, but always check with a meat thermometer.