Combine remaining ingredients, except won ton wrappers. Add to bok choy mixture, mixing well.
Place about two teaspoons of filling in the center of each won ton wrapper. Draw dough up and pinch together at three points to form a triangle, leaving middle of filling exposed.
Arrange on a heatproof plate or steamer tray and steam over boiling water until cooked through, about 4 minutes.
Serves 6 to 8.