Diane has a light lunch at Howard's Diner; though judging by the pile of dishes next to her ever-expanding belly, it's probably safe to assume that her definition of "light" is very different than everyone else's. =p
Oh well, Stacy doesn't seem to mind Diane's rampant gluttony too much; probably because "big eaters tend to leave big tips", as she likes to put it (though I don't know if that's actually true or not).