Perciatelli with Bolognese.

Ingredients Extra-virgin olive oil 4 ounces pancetta, minced 1/2 cup dried porcini, soaked, drained and chopped fine  4 cloves garlic, finely minced 1 medium onion, finely diced 1 large carrot, finely diced 1 celery stalk, finely diced 1 pound ground meat 1 pound ground skirt steak Salt and freshly ground black pepper  4 tablespoons tomato...