Butterfly pork tenderloin by cutting horizontally, not quite through. Open and lay flat. In a small glass bowl, stir together oil, garlic, soy sauce, chili sauce, mustard, lemon juice, salt and pepper. Place pork and marinade in a zip lock bag. Seal bag and refrigerate 2 to 24 hours. Remove pork from marinade and pat dry. Discard marinade.
Cook pork in a non-stick skillet or grill pan, about 5-7 minutes per side. Remove pork to a cutting board or plate. Tent loosely with foil and let rest 5 minutes before slicing. Arrange pork slices on salad greens. Add salad ingredients of your choosing. Sprinkle with crumbled blue cheese and drizzle with your favourite style of ranch dressing.