Well here is my favorite way for backstrap or tenderloin:

1. soak in salt water over night
2. Marinade in your favorite marinade over night, I always add some lemon juice.
3. Put strips of bacon on bottom of roasting pan, place meat on bacon, cover meat with bacon strips, slice onions, potatoes and carrots on top of it, cover it with foil, cook at 300 degrees until carrots are done and serve.

You will not need a knife, a fork will slide right through it.

The Tazman aka Martin Price
Founder and President of
Virginia Disabled Outdoorsmen Club