Boil pasta according to package instructions. Drain and rinse the pasta. Keep aside pasta water.
Meanwhile, slice or shred your mushrooms.
Add olive oil to a pan on a medium flame. Once heated, add mushrooms and saute. Once they're browned, add 1 tbsp soy sauce and watered down miso paste (1 tbsp miso paste mixed with 1-2 tbsp water).
Remove the mushrooms from the pan. Add olive oil, and saute sliced onions and minced garlic. Add soy sauce, mirin and add back in the mushrooms.
Add blended silken tofu, watered down miso paste, chili crisp and pasta water. Mix well.
Lower the flame and reduce the heat. Add in the cooked paste and stir in nutritional yeast.
Serve with more chili crisp and spring onions. Enjoy!