I've seen a lot of variations to this recipe, but this is my favorite.
Sprinkle backstrap with onion powder, garlic powder, and crushed black pepper. Then marinate overnight in a 50/50 mix of teriyaki sauce and worchestershire.
Wrap the meat with bacon a secure with toothpicks. Grill at high heat long enough to sear the bacon and then finish up on low. I prefer cooking until medium rare to medium. Be careful to avoid a flameup when the bacon starts to cook. If you have one, remove the meat until it dies down and then lower the heat before returning the meat.
Enjoy.

