Heat the oil at a medium setting.
Add the ginger, garlic, and chopped green chilli, and sauté for one or two minutes until fragrant, but not browned.
Add the spring onions and lemon zest, and continue to cook for another minute or two.
Next, add the grated carrots, cabbage, and chopped mushrooms, along with 1/4 cup coriander, and cook for 3 to 5 minutes.
Pour in the vegetable stock and lemon juice, and stir together.
Season with salt and pepper to taste.
Cover the pot, and simmer for 15 to 20 minutes, until the vegetables are tender.
Stir in remaining 1/4 cup chopped cilantro just before it is done.
Garnish with chopped coriander and lemon slices, and serve hot.