Put the steak, carrots, leeks, swede, pearl barley and bouquet garni in a saucepan on the hob. Add the stock and bring to a gentle simmer.
Transfer the contents of the pan to a casserole dish and cover with foil. Place on the lower rack of the halogen oven.
Set the temperature to 200°C (392°F) and cook for 45–50 minutes until the meat is tender. Season to taste with salt and pepper, and serve with potato or celeriac mash and green beans.