Rinse the pork and pat it dry. Place a wire rack over a baking sheet.
Combine the brown sugar, salt, pepper, smoked paprika, garlic powder, and mustard powder in a small mixing bowl.
Rub the olive oil over the pork and sprinkle it with the seasoning.
Cut 1 strip of bacon in half and set it aside. Place the remaining strips of bacon on a parchment-lined sheet of paper, overlapping them slightly so there are no gaps. Take the remaining bacon halves and place each piece at the top and bottom (perpendicular to the strips).
Place the pork tenderloin on top of the bacon strips, folding the two shorter strips over the ends of the pork.
With the parchment paper as a guide, tightly roll the bacon strips over the pork tenderloin until the ends of the bacon strips meet.
Place the pork tenderloin on the wire rack (bacon seam side down) and chill it in the fridge for at least 4 hours, but overnight is even better.
Preheat the oven to 300 degrees F and slow roast the pork for 65 to 75 minutes until it reaches an internal temperature of 145 degrees F on an instant-read thermometer.
Turn the oven to the broiler setting and place the tenderloin under the broiler to allow the bacon to crisp up a bit for just a few minutes. Watch closely so the bacon doesn’t burn!
Transfer the tenderloin to a cutting board and let it rest for five minutes before cutting.
Using a sharp chef’s knife, cut the pork into 1-inch slices and serve!