Boil heavily salted water for pasta. Cook according to instructions (minus 3 min)
Remove pasta & save 1 c pasta water
Off heat (or low heat) ½ c hot pasta water remaining in pot, add butter & miso and mix until combined (should resemble thick miso soup)
Turn heat on low, add back pasta & mix
Add parmesan & mix
Blend soft tofu with some pasta water & pour over pasta and mix well until sauce is thick
Taste and adjust seasonings as needed
Plate, add toppings & enjoy!
