Five Spice Powder
Combine peppercorns, anise, cloves and fennel seeds in a small skillet. Toss over medium heat about 2 minutes to toast lightly.
Grind in a coffee grinder or use a mortar and pestle. Add the ground cinnamon. Keep in a sealed container.
Preheat oven to 375 degrees F.
Brush tenderloins with soy sauce. Sprinkle with five-spice powder and grated ginger. You can marinate pork overnight in the fridge if desired.
Heat a large skillet on medium setting and add oil. When pan is hot add the pork and sear on all sides about 3 minutes. Remove from heat and transfer pork to a roasting pan. Finish cooking in the oven for about 15 minutes until done to your liking but still juicy.