Steak diane with roast potatoes

Method

1. Heat the oven to 200°C/180°C fan/gas 6. Toss the potatoes with a drizzle of oil, the garlic, herbs and plenty of salt and pepper in a roasting tray. Roast for 25 minutes, shaking halfway through, until the potatoes are tender and golden.
2. After the potatoes have been in the oven for 15 minutes, heat a drizzle of oil in a large, heavy-based frying pan set over a medium-high heat. Season the steaks with salt and most of both peppers, then
   cook in the pan for 3 minutes on each side for medium-rare (or until done to your liking). Remove and set aside to rest.
3. For the sauce, heat a splash of oil in the steak pan over a medium heat, add the shallots and cook, stirring, for 4-5 minutes until golden. Add the brandy and bubble on a high heat until most of it has evaporated. Add the stock and return to the boil, using a wooden spoon to scrape up all the tasty bits from the base of the pan. Turn the heat to low, stir in the crème fraîche and horseradish, then season.
4. Slice the steak and return to the pan with the sauce. Serve with the herby roast potatoes, plenty of sauce and watercress on the side.