Sprinkle cinnamon, ground pepper and salt on the tenderloin.
In a frying pan heat oil and brown seasoned whole pork tenderloin, both sides.
Remove from frying pan and add blueberries, sugar, ginger, lemon zest, and after cooking for a few minutes, add lemon juice and thyme. Cook approximately 10 minutes.
Then bring tenderloin back into the frying pan, reduce heat and if necessary add 2 tbsp water. Cover and simmer each side for 7-8 minutes.
Turn off and allow standing covered for 10-15 minutes, prior to slicing.