Prepare and mix the sauce ingredients in a small bowl.
Heat up a non-stick wok with some extra virgin olive oil, stir-fry all the mushrooms on medium to high heat for 3 minutes or until just cooked. Remove mushrooms including juice and set aside. Clean wok with kitchen paper towel.
Heat up the non-stick wok again with some extra virgin olive oil, stir-fry the capsicums and choy sum for 2 minutes or until they are just cooked on medium to high heat. Remove and set aside. Clean wok with kitchen paper towel.
Fill a medium pot half full of water, bring to a boil and turn off the heat. Add 2 tablespoons extra virgin olive oil and the rice noodles into the wok for 2 minutes or until the rice noodles are just soft. Separate the noodles, drain the water, remove and set aside.
For stir-frying and combining the dish, heat up the non-stick wok with 6 tablespoons of extra virgin olive oil, add garlic and ginger and stir-fry until lightly golden on low heat. Return the rice noodles to the wok. Then add the sauce, toss and mix well.
Add in the all the cooked mushrooms, capsicums and choy sum and stir and mix well for another 5 minutes on medium to high heat or until heated through.