I think a homeless person would enjoy the less healthy part of the meal also, Mary. :)

There is a Lebanese restaurant I go to for lunch that offers small sandwich sized meals (gyros, etc) and also dinner plates with lots of meat, rice, etc. The rule of thumb is that if you're getting the larger meal half of it goes home for dinner. It's pretty much what they expect.

I use what are considered "lunch plates" all of the time here, because dinner plates are very large and filling one of those means you have too much food in front of you. The lunch plates are a couple of inches smaller in diameter. Also, plating a meal in the kitchen and serving that way versus putting the whole casserole or pot or whatever on the table means people are less likely to overeat.

SRS