Jimmy V's Marinade: Great on a butter flied back strap.

3 lb piece of back strap, butter flied to 1/2 " thick or less
fresh ground pepper
salt
2 tbsp olive oil
2 tbsp soy sauce
1 tbsp Worcestershire sauce
1/2 tsp garlic powder
dash of liquid smoke
dash of Kitchen Bouquet

Take the butter flied back strap, and salt and pepper each side.  Use a fork to thoroughly pierce the back straps to allow marinade to soak in.   In a shallow marinade pan, mix all remaining ingredients and stir to form marinade.  Lay back straps into pan, and marinate, turning several times, overnight or during the day.  Over a HOT grill, cook the back straps only until the meat is medium.  Let meat sit for a moment or two before slicing, and then cut thin, angled slices.  Serve with a salad, wild rice and a nice cabernet sauvignon.