Place the cashews in a small bowl, cover with 100ml boiling water and set aside to soften.
Add the hazelnuts and sesame seeds to a frying pan over medium heat and gently fry them until golden, tossing frequently.
Bring a large saucepan of salted water to the boil. Add the kale and cabbage, and cook for 2–3 minutes. Drain and refresh in cold water, and drain again thoroughly, removing as much water as possible.
To make the dressing, transfer the cashews along with the water to a high-speed blender. Add the remaining dressing ingredients and blitz until smooth, adding a splash of water as needed to loosen.
To serve, toss together the vegetables, dressing, hazelnuts and sesame seeds. Transfer to a large serving bowl or platter.
