Wash the grains, then put them in the rice cooker with hot water, 1/2 tsp salt and 1 1/2 tsp vegetable stock powder. Set it to the 'brown rice' setting and cook until the water has dried up.
Meanwhile, cut the burdock strips and each mushroom into bite-sized pieces. Set aside for later.
Wash the greens 3 times in lightly salted cold water, then let them drip dry in a colander. Separate the stems and leaves and cut them into 3cm (1.2") segments to leave aside.
Pour 1/2 cup oil in the pan on medium heat and add the ginger in to cook for 30 seconds or until fragrant.
Pour in the sliced mushrooms and burdock. Cook on high heat for 3 minutes or until just brown.
Season the ingredients with the vegetarian oyster sauce, light soy sauce, honey, pepper, 1/2 tsp vegetable stock powder and 1/2 tsp salt.
Pour the cooked ingredients into the rice cooker and close the lid as you work on the vegetables.
Add the remaining oil into the wok and keep the heat on high. Cook the stems for 2 minutes or until just beginning to soften.
Toss in the leaves along with the remaining salt and chicken bouillon powder, then stir for 3 minutes or until cooked.
Lay the greens over the mushrooms.
Stir the contents in the rice cooker and let it cook for another 10 minutes with the lid on, then serve immediately as is!