Perfect Pork Tenderloin

Place the sweet potato in a medium saucepan and cover with water. Bring to the boil and cook for 10 minutes or until tender. Drain. Return the potato to the saucepan and add half of the butter and salt and pepper. Using a fork or potato masher, mash until smooth. Cover to keep warm.

Meanwhile, rub the pork tenderloin with a little olive oil and season with salt and pepper. Heat an ovenproof frying pan over a medium-high heat. Add the pork and cook for 2 minutes on each side and then transfer to the oven and cook for 12-15 minutes. Transfer the pork to a plate and rest for 5 minutes. Cut the pork into slices.

While the pork is in the oven, heat the olive oil in a medium frying pan. Add the red onion, red cabbage and fennel seeds and cook, stirring, for 3-4 minutes or until soft. Add the green apple and remaining butter. Reduce the heat to medium-low and cook, stirring, for 1-2 minutes.