If you cannot find dried porcini feel free to omit this ingredient and step. When the instructions say to add the 1/2 cup of porcini broth, use water or chicken stock instead. This instructions in this recipe is written to limit the use of pots and pans used. The goal is to only use one large pan (I use a stock pot) and one large baking pan (I use a 9×13 inch ceramic baking dish). To make this recipe gluten-free, use your favorite gluten-free pasta.