Re heat the wok to medium and add 1tbs of oil. Add the diced bacon and stir fry for 2 minutes, then add the thinly sliced pork and the garlic and ginger(if using) continuing to stir fry for a minute or two. Then add the spring onion and fry for a further minute or two. Lastly add the peas, prawns (if using) and the bean shoots frying for a minute between each addition. Remove from the heat and set everything aside in a large bowl.