Vinegar and Salt Brined Rotisserie Tenderloin
Place tenderloin in brine mixture and refrigerate 10 to 15 hours. Remove from marinade, rinse well, and pat dry.
Follow manufacturer's rotisserie directions: secure clamp and fork at one end of rotisserie rod; slide rod through center of meat. Attach the other fork and secure clamp. Make sure meat is balanced. Tie-up loose pieces of meat with string. Rotisserie cook at 350°F over a pan of water with the lid closed.
Combine melted butter, garlic, and soy sauce. Baste tenderloin every 15 minutes. Cook until rare or medium-rare for best juiciness and tenderness. Let meat rest 15 minutes, then slice and serve. (Variation: tenderloin may be grilled directly over the fire, turning every 5 to 7 minutes to sear all over until desired doneness.)

