In a dish large enough to hold the tenderloin, combine the sherry and soy sauce. Add the pork. Let marinate, 1 to 2 hours, turning several times.
Remove the tenderloin.
Spread the honey on a plate. Roll the pork in honey, then in sesame seeds. Place the tenderloin in a roast pan, roast at 350 degrees F. for 20 minutes, or until meat thermometer registers 155 degrees F. Let stand 5 minutes, then slice thinly on the diagonal.
Combine all remaining ingredients for dipping sauce. Place in a bowl in the center of a serving platter. Surround the bowl with the spinach leaves. Arrange pork slices on top.