Preheat oven to 325
Brown the pancetta in a Dutch oven, or similar pot on medium heat for about 5 minutes. Add the pancetta, stirring occasionally.
When the pancetta is crispy and most of the fat is rendered (5 mins) remove to a plate covered with paper towel and set aside. Leave 2 tbsp of fat in the pan
Season the veal shank with salt & pepper, dredge the shanks with some flour, shake off any excess, place in the pan with the hot fat.
Increase the heat to medium high and cook until each side is well-browned (about 5 minutes per side). Set the shanks on a plate, and set aside.
Saute the onions, carrots, celery (mirepoix?) stirring frequenlty, until the onions are translucent - about 5 minutes.
Add the garlic and thyme.
Cook until the vegetables begin to brown (10 minutes).
Add the shanks and pancetta to the pan, add the wine and enough stock to go halfway up the sides of the shanks.
Bring to a simmer, cover the pan, and put in oven to cook until tender (60-90 minutes).