I've figured it out: I'll start a line of frozen "diet foods:" attractively packaged, with photos of tasty meals and inside, a nice reusable plastic plate. ...And no food. Not a bit. I'll call it "Barmecide Feasts." It'll be a year, easy, before anyone bothers to look up the term.
(And recipes -- "Super-Easy Chicken Barmecide!" Oh, I will be rolling in money. Or at least miming it.)
6 months ago