All-American steak with sweet potato chips recipe

Preheat the oven to 220°C/fan200°C/gas 7. Combine all the marinade ingredients in a large dish. Add the steaks and mix to coat in the marinade. Season well and set aside to marinate for at least 20 minutes.

Place the sweet potatoes in a roasting tin and toss with the cayenne pepper and vegetable oil. Season with sea salt and black pepper and roast in the hot oven for 30 minutes until golden and crisp.

Just before the chips are ready, heat a griddle pan or heavy-based frying pan until very hot. Add 1 steak, and cook for 2-3 minutes each side for medium rare. Set aside on a warm plate to rest while you cook the remaining steak, then serve with the sweet potato chips.