From the author of Whole Beast Butchery, "practical and delicious ways to use the most under-appreciated parts of the animal" (David Chang, chef/owner of Momofuku). With the rise of the handcrafted food movement, food lovers are going crazy for the all-natural, uniquely flavored, handmade sausages they're finding in butcher cases everywhere. At San Francisco's 4505 Meats, butcher Ryan Farr t…