Trim the pork tenderloin of any excess fat and sinew and cut the tenderloin in half if needed to fit an oven-safe skillet.
Sprinkle the pork evenly with the cinnamon, cumin, salt and pepper. Rub it all over evenly.
Warm the oil in the skillet and sear the pork on all sides, including small ends.
Transfer the skillet to the oven and roast for around 25 minutes, adding 2 tablespoon of rhubarb chutney over the pork for the last 5-10 minutes, until pork has internal temp 155F (68C).
Leave to rest around 5 minutes before serving sliced with remaining rhubarb chutney.
Notes
You can make the chutney ahead of time or prepare it during the initial pork cooking time.