Prep And Season The Pork
Tie the pork tenderloins together into one thicker roast. Trim off any visible silver skin. Season the inside with Diamond Crystal kosher salt, then add granulated onion, granulated garlic, umami mushroom powder, a small amount of ginger, and smoked paprika. Tie the pork together tightly using butcher’s twine, then season the outside with the same ingredients, adding black pepper.
Make And Inject The Butter Mixture
Melt a full stick of unsalted butter and add a pinch of salt, about a teaspoon of umami mushroom powder, and about a quarter teaspoon of ginger. Use an injector to inject the mixture throughout the pork tenderloin.
Let it Marinate
Place the pork in the refrigerator for at least 1 to 2 hours, or overnight for best results. 
Smoke The Pork
Fill the pellet hopper on the Woodfire with smoke and pecan pellets and give it the “Dad Shake.” Place the pork on an elevated rack in the Ninja Woodfire. Cold smoke for 20 minutes. Insert a temperature probe into the center of the meat and continue cooking at a low temperature setting around 200°F (93°C), noting it cooks hotter similar to about 250°F (121°C)in a conventional smoker. Cook until the internal temperature approaches 135°F (57°C).
Finish And Broil
Once the pork reaches around 135°F (57°C), check the crust. If needed, switch to broil for about 2 to 3 minutes to develop additional color. The pork should finish around 140°F (60°C) before resting.
Rest And Slice
Remove the pork and let it rest for about 15 to 20 minutes until it reaches a final temperature around 145°F (63°C). Remove the twine, slice down the middle, and serve.