Preheat the oven to 160°C or 140°C fan assisted (gas 3).
In a heavy based roasting tray over a medium high heat sear the
beef in a little olive oil on both sides, remove from the tray
& cook the shallots, garlic & carrot until
caramelised.
Add the tomato paste & red wine & reduce to syrup then
pour over the stock, bring to a boil & thicken with the corn
flour mix before placing the beef back in the tray.
Place in the oven covered & slow cook for 2½ to 3 hours,
basting regularly with the stock until the beef is tender.
Remove the beef from the stock, place on a warmed deep serving
dish & cover with foil to keep warm.
Pass the stock into a clean saucepan, reduce until you reach a
rich sauce like consistency, add the diced tomato & pass the
sauce back over the beef.
For the gremolata simply mix the ingredients together &
keep to one side.
To cook the pasta bring a pan of lightly salted water to the
boil, add the pasta & cook for 4 to 5 minutes, drain & toss
with a little olive oil.
Serve the osso bucco with the Pappardelle and generously
sprinkle over the gremolata. Enjoy with a glass of Chianti.