Mix rub ingredients in bowl and rub outside the pork.
Preheat smoker to 225°F. Smoke pork until the internal temperature reaches 135°F. Brush with your favorite BBQ sauce and continue to cook until internal temperature reaches 145°F.
Remove from the grill and slice into ½ inch medallions.
Notes
Use apple wood for smoking. Apple and pork go together like peas and carrots.
If you don't want to make your own spice rub, just use store-bought.
Let the tenderloin rest for 5 minutes before slicing which lets the juices stay inside.
Slice the pork against the grain so it remains tender.