Mix all the sauce ingedients in a jar and shake well. Set aside.
Green Beans
Heat vegetable oil, over high heat, in a large non-stick skillet until smoking. Add the beans and cook until tender-crisp and blackened in spots. Stir frequently so they don't burn. This may take 5-8 minutes. If beans appear to be burning reduce the heat.
Transfer beans to a plate. Reduce heat to medium high. Add the pork to the skillet and fry, breaking pork into small uniform pieces. Cook 3-4 minutes until pork is no longer pink. Add the ginger and garlic and cook 1 minute. Drain off any excess fat or liquid from the pork.
Shake the sauce to recombine, add the beans to the skillet with the pork. Add the sauce and cook a minute or so till sauce is slightly thickened.
Serve garnished with green beans and sesame oil if desired.
Notes
Note 1: I used a full pound of pork which made the dish more substantial, closer to a main dish style. No need to adjust the sauce amounts indicated in the recipe - the pork was still very flavourful.