Combine the beans, pimento, nutritional yeast, lemon juice, tahini, onion powder, mustard, and salt in the bowl of a food processor.
Process on high until the mixture is completely smooth and creamy, scraping down the sides of the bowl as needed.
Transfer the spread to a container and chill thoroughly in the refrigerator for at least one hour before serving to allow the flavors to meld.
Adjust the 'cheesiness' to your liking by starting with 6 tablespoons (90 ml / 3 fl oz) of nutritional yeast and adding more until you reach the perfect flavor.