Cook once, eat twice. It's an idea any busy home cook can get behind, and it's what we love about involtini di manzo. As these meat rolls cook, their juices mingle with the tomato sauce and a few hearty bits get left behind, too. So hold on to that leftover sauce and use it to dress pasta a day or two later. We like it with rigatoni, spaghetti, or Gnocchi di Patate.