Place the capsicum, wine, vinegar, garlic, oil, salt and pepper in a bowl and toss to coat. Set aside to marinate for 30 minutes. Heat a char-grill pan or barbecue over high heat. Brush the potato with oil and char-grill or barbecue for 2 minutes each side or until golden and cooked through. Set aside and keep warm.
Brush the steaks with oil and sprinkle with salt and pepper. Char-grill or barbecue for 2–3 minutes each side for medium-rare or until cooked to your liking. Top the steaks with the potato, capsicum, rocket and parsley and spoon over the marinade to serve. Serves 2.