You have of store credit. To use it, simply place your order and you will be able to choose store credit as the payment method when it comes time to pay for your order.
Fettuccine is a type of pasta popular in Roman and Tuscan cuisine. It is a flat thick noodle made of egg and flour (usually one egg for every 100 g of flour), approximately a 1/4" wide - wider than but similar to the tagliatelle typical of Bologna. It is used in a variety of sauces, and is often eaten with sugo d'umido (beef ragù) and ragù di pollo (chicken ragù).