You might want to consider, scarbelly, that italians are very VERY particular about their own food and the whole world has a reputation for having terrible food (yes, everywhere) because they try to eat Italian wherever they go and of course nobody cooks italian like italians do. Not anyone's fault, it begins with the ingredients being different, but there is just a very different idea of Italian food in the states and other countries than there is in Italy.
So you might want to try a very american reception, with the best of the american stuff they;ve probably gotten to like but because they;re going home will not get a chance to eat again.
Imagine yourself in Italy for a year, and then about to go home where you will be able to eat all the things you've missed all that time (and believe me there will be plenty, from bagels to muffins to a elaborate sandwiches to guacamole, burritos, fried chicken, and ton of other stuff) and instead of giving you a sendoff with the wonderful things you will later miss about italy, they give you sort of less-than-average quality stuff you're going to get in a few days in its original version anyway (dry bagels, overly sweet muffins, sandwiches on very thin dryish bread that have been sitting out all day and the corners curled, guacamole that's nothing but squashed underripe avocados and some tomatoes etc). I know what you make will be great, but that doesn't mean it will be the way italians eat it. And in a short time they;ll be getting mamma's version of everything, and NOBODY can cook like Mamma.
I guess the idea is the local students want something italian, but i bet you'll have all the italian exchange students eating around the dishes where the guacamole is, and all the other typically "American" things are.
Just a thought.