Add the flour, salt and pepper to a bowl and mix well.
Cut the string off the lamb. Cut off the fat and set aside. Dice the lamb into large chunks, about an inch big.
Dice the carrots, onion and broccoli stalk. Peel the garlic. Finely chop the rosemary.
Put the stock cub into a large heat proof jug with half a cup of boiling water. Leave to soften for a few minutes, then whisk to dissolve. Add the red wine, worshesture sauce and passata.
If using a searing slow cooker, pre heat on high sear, otherwise use pre heat a frying pan.
Coat the lamb pieces in flour.
Add the cut off fat to the pan, cooking until the fat starts to render off and it becomes brown and crispy around the edges. Remove and discard.
Heat the pan up again. Add the coated lamb, shaking off any excess flour before adding. Cook on high, moving around to ensure all sides are seared and starting to brown. Transfer to a heat proof bowl.
Re heat the pan. Add the diced carrot, onion and broccoli stalks. Cook, stirring frequently until vegies are starting to soften and caramelized. Turn off heat.
Add the crushed garlic and stir well. Add the browned lamb and any juices from the bowl.
Sprinkle over the rosemary. Pour over the sauce so that all the lamb and vegies are covered.
Cover with the lid and cook on low for seven hours, or on low for 4 hours.
Fifteen minutes before the pasta is done, boil and water and cook the pappardelle pasta according to the packet instructions.
Strain the pasta and add to serving bowls. Top with lamb ragu sauce and toss through pasta.
Garnish with shaved parmesan and chopped parley. Delicious!