At the moment, without a doubt Bottarga with Martelli Spaghettini. Bottarga is dried tuna roe, and has a rich flavour that's hard to describe. You only need a few shavings of it - a little goes a long way (which is lucky given the price!). We've found its not commonly available here in Melbourne (Australia), However Sud restaurant serves it, and you can get it from the importer, Enoteca Sileno in Carlton. Anyway, dead simple - cook the spaghettini (or other thin pasta of your choice). Throw the pasta in a strainer, put the pot back on the heat, throw in some olive oil, add some garlic and the bottarga, throw the pasta back in and mix briefly. Throw into bowls with a little reggiano and enjoy! I also have a soft spot for Puttanesca sauce, especially in the colder months.