In a small bowl, stir together the water, wine, Worcestershire sauce, lemon juice, and mustard; set aside.
Trim any separable fat from the pork slices.
Sprinkle both sides of each slice with lemon pepper.
In a skillet, melt butter over medium heat.
Cook pork in hot butter for 6-10 minutes or until just slightly pink in the center and juices run clear, turning once during cooking time.
Remove meat from the skillet and keep warm.
Remove skillet from heat; add sauce to skillet; stir until well blended, scraping up any browned bits from the skillet.
To serve, spoon sauce over pork slices and sprinkle with chives or parsley.
