When you find out you cannot eat gluten, one of the first foods you worry about living without is pasta. There's a certain mourning involved, imagining a trip to Italy without a mound of fresh fettuccine. Guess what? The Italians make great gluten-free pasta, since many of their citizens have celiac sprue. You can buy a package of gluten-free pasta at the farmacia and take it to the best restaurant in town, where they will make the pasta of the day for you. When we first started making…