Heat a Dutch oven on the stove top over medium heat for about five minutes. Add pancetta to pan, cook, stirring occasionally. When the pancetta is crispy and most of the fat has rendered (about 5 minutes of cooking), remove the pancetta to a plate covered with some paper towel and set aside. If necessary, drain off all but two tablespoons of the fat from the pan.

Season the veal shank well with salt and pepper. Dredge the veal shanks through some flour, shake off any excess, and add the meat to the hot fat in the pan. Increase the heat to medium high and cook the meat on each side until well browned (about 5 minutes per side). Remove the shanks to a plate, set aside.

Add the onions, carrots, and celery to the Dutch oven. Cook the onion mixture, stirring frequently, until the onions are translucent (about five minutes) and toss in the garlic and thyme. Continue cooking until the vegetables just begin to brown (about 10 minutes).

Add the shanks and the pancetta back to the pan. Pour in the wine, and then add enough stock to come a little more than half way up the side of the shanks. Bring to a simmer. Cover the pan and put it in the oven to cook until the meat is tender, about an hour to an hour and a half.

Combine the gremolata ingredients, place in a separate small serving dish.