Set turbo broiler to 350F. Broil pata for 20 minutes.
Boil water in a cooing pot. Add broiled pata. Boil for 15 minutes. Drain water and then wash the pata with running water.
In a clean cooking pot, arrange the pata. Pour soy sauce, Sesame oil, cooking wine, and water. Add whole peppercorn. Boil for 1 to 2 hours or until pork gets tender. Note: you can use a pressure cooker to tenderize the pork leg quicker.
Add Knorr Pork Cube, star anise, and Shitake mushrooom. Cook for 20 minutes. Note: add more water if needed. Make sure that there is at least 2 ½ cups of sauce in the pot.
Add sugar. Stir. Pour cornstarch and water mixture. Stir and cook until sauce thickens.
Add baby bok choy. Cook for 2 minutes.
Transfer to a serving plate. Serve. Share and enjoy!