Method
Begin by putting the lamb in a bowl with chopped onions, garlic, BBQ sauce, salt, balsamic vinegar and olive oil and leave in fridge to marinade.
Preheat oven to 180°C/gas 4.
Prepare the vegetables to be roasted. Place on a baking tray and drizzle with oil.
Place in the oven for 30 minutes, or until tender and lightly roasted.
Fry the lamb in pan and coat with some of the marinade.
Serve the lamb and roasted vegetables with cous cous.