In a saucepan, melt the butter.
Add the coleslaw mix and saute for a few minutes until softened.
Add the cooked pork and the Teriyaki or soy sauce.
Allow the mixture to cool slightly.
Lay out your won ton wrappers and spoon about 1 TBS of the pork/coleslaw mixture into the center.
Using your finger or a small pastry brush, apply some water to the edges of the won ton wrapper.
Fold the won ton wrapper over and seal the edges completely.
Heat some oil in a heavy saucepan.
Add the prepared won tons, a few at a time.
Fry until golden brown; let them drain on a baking sheet lined with paper towels.
Serve with hot mustard or soy sauce.