Drizzle the butternut squash with olive oil and roast for 20 mins or until tender.
Cook the pasta in a pot of boiling water, according to the packet directions.
4. Heat 1 tbsp olive oil in a non-stick frying pan. Add flour and cook, stirring, for 1 min. Gradually add the milk and miso, and whisk for 5 mins or until the sauce boils and thickens.
Add the drained pasta, pumpkin, spinach and 1/4 cup of the cashew parmesan, and stir to combine.
Season to taste with salt and pepper, and top with remaining parmesan.