Preheat oven to 350 F (175 C).
Make cheese sauce according to recipe.
After it’s blended, take a spoonful and eat it because it’s so good. Then add the water, extra apple cider vinegar, mustard seed powder, chickpea miso and salt.
Once pasta is done, drain and rinse well to prevent too much starchiness in the baked dish.
Return to the pot and mix in cheese sauce.