1Heat a 4 ½ qt Dutch oven over medium-high heat until hot. Season the veal shanks with salt and pepper. Add 1 tablespoon of the oil and half the shanks to the Dutch oven. Cook for 2-3 minutes on each side until browned all over. Transfer to a plate. Repeat with the remaining osso bucco.
2Reduce the heat to medium, add the remaining oil, onion, carrot, celery and garlic. Cook, stirring for 4 minutes until soft. Add the spices and bay leaves. Cook, stirring for 1 minute.
3Add the wine and bring to a boil, boil gently for 2 minutes. Add the tomatoes, lentils and stock. Return the shanks and any accumulated juices to the Dutch oven, ensuring the shanks are submerged in the sauce. Press a piece of parchment paper onto the surface, this helps keep the shanks submerged. Cover with a tight fitting lid or double layer of foil, pressed down around the edges to seal.
4Insert the wire rack into the bottom shelf position. Preheat the oven. Select SLOW COOK/ HIGH/4 hours and press start.
5Once preheated, place put the pot in the oven and cook for 4 hours. The meat should start to fall off the bone when you lift a shank out of the sauce. Remove the bay leaves.
6Spoon the shanks and sauce into serving bowls. Season with salt and pepper and serve with polenta or crusty bread.
Tip: Before you start, check that the Dutch oven fits in the oven.