Combine honey, spices, chilli, lemon rind and juice in a bowl. Place meat in the bowl to marinade for about half an hour. Saute the chopped onions and thyme until soft and browned. Place the cous cous and stock in a bowl, cover and stand for five mins. Microwave for three mins to cook through. Cut the malt loaf into cubes and place with the meat alternately onto skewers. Place the rosemary sprigs on the ends for flavour. Grill on a high setting until the meat is cooked through (approx 8 mins). Add the onions to the cous cous, stir through and season. Serve the kebabs on top of the cous cous with a little low fat natural yoghurt.