Preheat oven to Gas Mark 4-5, 180ºC, 350ºF.
Mix together thoroughly the marmalade, oregano, garlic, cayenne and oil. Add the steaks and coat well in the mixture. Cover and leave to marinate for about 1 hour in the fridge
Place the sliced potato onto a baking tray, sprinkle over the chillies, spice and oil, toss to cover.
Place in the oven for about 40-50 minutes until potatoes are tender, crispy and golden.
Remove the steaks from the marinade and scrape the sauce off - retain.
Preheat the BBQ or griddle pan and cook steaks:
Rare: 2 minutes each side
Medium: 4 minutes each side
Well Done: 6 minutes each side
Heat the leftover marinade in the microwave until bubbling hot. Allow steaks to stand for 5 minutes before serving with heated sauce, potatoes and black bean, spring onion and orange salad.