Linguiça sausage, a spicy Portuguese link of highly seasoned pig innards, is a staple of the menu at NYC chef George Mendes's popular restaurant, Lupulo. It's wood-grilled to a crisp and topped with cilantro, pickled carrot and onion, and chili-infused mayonnaise.Chef Mendes uses the sausage in many forms, including in a breakfast sandwich at Bica. Over Labor Day,…