What is the best way to cook tenderloin?

Fried up with garlic and onions and butter ......... MmmMmmmm!!

On my grill!!!!!! LMFAO!!!!!!! Cut up about 1-1/2 thick steaks, soak over night in 7-UP soda and sliced lemon or 2 in a freezer bag. Everynow and then, go squeeze bag to get soda and lemon into the meat more and then next day BBQ with a piece of bacon wrapped around it. Serve with cold beer and enjoy!!!!!

The last two deer I killed I kept the loins and backstrap hole and I smoked them. I marinated them overnight in soy sauce, olive oil, and montreal steak seasoning. Then I added bark from my hickory tree and smoked them until the internal temp was around 135 degrees. I was raised being told that venision has to be cooked well done. I now know that it doesn't and cooked to about 135 then I let them sit for about 5 minutes and it is great. If you have a smoke give it a try sometime, you won't be disppointed.
The loins cook pretty quickly in the smoker and make a great snack while we wait on the back straps to finish.

Cooked a few backstraps that way myself but I used a rotisserie was good eating.

I like to get them out fresh clean them up real good salt and pepper it. Get you some foil and place them in that. Pour some Italian Dressing,garlic,butter,fresh onions and put it on the grill for a little while. Great flavor.

hot and fast its just like a beef steak without as much fat

What is a backstrap hole? I have never seen one with a hole in it.

Right from the back to the grill!!

Exactly, i could never understand why people ruin the taste of game with all of these seasonings.