I cook ridiculously huge, somewhat fancy meals when I have munchies. And for some reason, a lot of people I have gotten stoned with do the same thing: one guy who i was briefly in a band with would get high during rehearsal, and then, mid-song, he'd dissapear, and then return, 30-45 minutes later with a plate of falafels, cucumber salad, pita and hummus, the first two of which he had cooked himself from scratch. a lot of other people i hang out with do similar things.
personally, when I get high, I go straight for a bag of dry sliced mangoes... which only whets my appetite, and leads to me cooking a feast of foods that dont even go together. typically, it'll be a mix of italian, lebanese, brazillian and kosher food (I'm not jewish, I just really like a lot of jewish food; knishes, latkes, blintzes, and pickles to name a few). also, I find that drinking a single beer, preferably an ale, will fill me up just fine on it's own, which i now realize is probably why I never get munchies at night (since I almost always have a beer at night). drinking a pint of Guinness is like having a full meal in itself!