Preheat the oven to 200°C (400°F)

Cut away any silverskin on the pork

Cut the olives in quarters

Cut the tomatoes and the feta cheese into small pieces

Make a slit along the tenderloin

Stuff it with all the filling then take a string and tie it together

Sear the pork on all sides on high heat

Roast it in the oven until the meat reaches 63°C (145°F) or for about 25 min

Wrap in tin foil and let it rest for 5-10 min before you cut it

Serve with some greens and perhaps hasselback potatoes, a potato gratin or similar.