Heat some sunflower oil into a frying pan and add the kohlrabi. Season with black pepper and sea salt. Fry for about 3-5 minutes and stir regularly.
Chop the white part of the spring onion stalk and finely slice the green part. Once prepared add the spring onion, button mushrooms, chilli to the frying pan and stir well.
Deglaze with the soaked forest mushrooms. Add the peas, soya cream, soy milk, tahini, yeast flakes and stir well to combine. Turn the heat down to medium heat. When it starts to bubble, add potato starch mixed with a splash of water and whisk well.
Turn the heat down to a simmer. Season again with sea salt, black pepper and nutmeg.
Let the sauce simmer for 5 minutes, turn off the heat and cover with the lid. Let it rest until your pasta is cooked. When the pasta is ready, add to the sauce and stir well to combine.