My mom had this like 30 years ago at a bridal or baby shower & went nuts for it. She started making it for us, and passed the recipe down to me. If I ever would have read the ingredients without trying it first, I never would have made it! But it is sooooo good. My ex-husband still asks for this as his birthday dinner every year. :) He's lucky it's easy to prepare.
Cut chicken in large, bite-sized pieces. (Note, I always use large bone-in chicken for this. If you use boneless, skinless, you will need 3 breasts prolly.) Salt & pepper.
Steam or blanch broccoli until it is softened & bright green. Don't overcook it. Drain VERY well. Cut into large pieces. (I usually leave some of the stalk on, just because I like them & think it looks nicer, but you can just use the florettes.)
Mix in large mixing bowl lemon juice, mayo, soups, & some salt & pepper.
Mix chicken and broccoli with lemon juice & soup mixture. Spoon into ungreased 9x13 baking dish. Top w/ cheese evenly and bake covered for 15 minutes, and uncovered for 15 minutes (total 30 mins) on 350. If you like your cheese more brown, bake uncovered the entire time.