Quick steak grill

Heat grill to high. Thickly slice the potato, then lay slices on a large non-stick baking tray and brush with oil. Grill for 10 mins until browned. Flip over the potatoes, add the mushrooms and tomatoes to the tray and brush with oil, then return verything to the grill for another 10 mins until cooked.

Heat remaining oil in a frying pan. Season the steaks, then sear for 1 min on each side for rare, 1½ mins for medium or 2½ mins for well done. Remove and leave to rest. Add a splash of water to the pan, crumble in the stock cube, then boil to make a thin gravy, adding any steak juices from the plate. Serve the steaks with the veg, a handful of watercress and the gravy.