Add elbow pasta and vegetable broth to the Instant Pot. Lock lid and pressure cook on high for 5 minutes. Quick release the pressure.
While pasta cooks, blend soaked cashews, nutritional yeast, lemon juice, mustard, garlic powder, onion powder, turmeric, and a splash of broth or water until very smooth.
If there's too much liquid in the pot, drain some but leave a little behind. Pour in the cashew sauce and stir to combine.
Turn on sauté mode for 1–2 minutes if needed to thicken and warm the sauce. Season to taste.
Serve hot with your favorite toppings or mix-ins.
Notes
Use gluten-free pasta if needed, but shorten the pressure cook time slightly.
Mix in steamed broccoli, peas, or spinach for added texture and nutrition.
Leftovers thicken—just reheat with a splash of milk or broth.
Keyword dairy-free pasta, instant pot vegan, vegan mac and cheese