I love all kinds of street food because it is clean, simple, and unpretentious. Ethnic food is pretty hard to come by here in the North, but you can get by. Although you can't get a tomatillo anywhere in the city, canned or fresh, the selection of Asian groceries is not too bad. I have never dabbled in Vietnamese food at all, but this recipe in Vegetarian Times looked simple enough and I had the ingredients on hand (though I did not make it very spicy for the kids). I like the idea of a pickle or slaw to ratchet up a sandwich a couple of notches and will have to explore this concept more in the future.