Heat olive oil in a 10 or 12 inch cast iron skillet (see note) over medium-high heat until just smoking. Reduce heat to medium and brown the pork tenderloins on all sides, about 8-10 minutes.
Remove pork from pan and set on a plate.
Add maple syrup and spices to pan, scraping the pan to deglaze then bring to a boil.
Remove pan from heat. Using tongs, roll pork in the glaze to coat all sides. Place tenderloins in the pan and transfer pan to the oven.
Roast until the thickest part of the tenderloin reaches 130°, about 15 minutes. Spoon glaze over the tenderloins and continue roasting until it reaches 145°, about 2-4 more minutes.
Use a thick potholder to remove the pan from the oven (the handle is HOT), ladle up more glaze from the pan on top of the pork. Let rest for 10 minutes.
Slice thinly and serve.
Notes
If you do not have an ovenproof skillet, brown it in a skillet the transfer the pork to a baking pan. Deglaze the skillet with the maple syrup and pour over the pork tenderloins.