Meat and Spinach Cannelloni

I always roast meats by adding some liquid to the roasting pan first, then allowing it to cook away and the meat to brown. The aromatic steam penetrates the meat before the surface of the meat is seared by the heat. Then I add more liquid as the meat cooks, to make a delicious pan sauce. Mortadella is one of those ingredients that give a tremendous amount of flavor to meat-based ravioli or cannelloni fillings. Think of mortadella as the Italian version of bologna, seasoned with Italian spices and studded, mosaiclike, with pistachios and cubes of seasoned pork fat. Thinly sliced mortadella is delicious as part of an antipasto assortment or in a sandwich. Add the mortadella to the meat and vegetables when they’re fresh out of the oven: the steam coaxes the flavor out of the mortadella. To grind the meat-and-vegetable mixture, you can use a hand-cranked meat grinder or a grinder attachment for an electric mixer. In either case, choose a disc that is fine but not too fine. Although it isn’t absolutely necessary, when I have besciamella handy, I like to stir a little into the meat filling. It helps to bind it and adds a smooth texture. You can prepare this filling with a combination of beef, veal, and pork, or with leftover roasts, like turkey, pork, or beef. If you’re making this filling with leftover meat, reheat it by simmering it with its own gravy and the porcini-soaking liquid, the soaked porcini, and some vegetables, like diced onions and celery and shredded carrots. When the meat is warmed through and moist and the vegetables are tender, season them, add the remaining ingredients, and grind as above.