Heat the olive oil and sesame oil in a saucepan, add the spring onion, mushrooms, ginger and coriander and cook for a few minutes. Crumble the silken tofu into the pan, cook for a further few minutes and then add the sauerkraut and stir through. Turn off the heat and let mixture cool.
Once the mixture is cool, spoon about 1 teaspoon of mixture into the centre of a wonton wrapper and fold it into a dumpling. I use a little bit of water on the edges to hold it together.
Heat the oil in a large saucepan. Add the onion and cook for around 5 minutes, till softened. Then add the bok choy stalks, garlic and ginger and stir for a minute. Add the water, vegetable stock and wedge of lemon and cook for about 5 minutes. Add 8 (or more!) of the wontons you have made to the soup. Also add the leaves of the bok choy at this stage, the coriander and stir through the sauerkraut. Cook on a low simmer for 5 minutes until wontons are ready. Serve up and enjoy!