vegan, makes 5 cups

3/4 cup nutritional yeast flakes
1 can cannellini beans, drained (about 1 1/2 cups)
2-3 Tbsp tamari (replaces added salt)
1 tsp garlic powder
1 1/2 Tbsp mustard powder
1 Tbsp Dijon mustard
1/4 tsp fine pepper
1 cup mashed sweet potato OR 1/2 cup instant mashed potato (unflavored) + 1/2 cup water
*see note below
1/4 cup extra virgin olive oil
1/4 cup vegan butter (Earth Balance) softened
1-2 Tbsp agave syrup
2 Tbsp tahini (adds a tang to the sauce – just as real cheese would)
Last step: thin out to desired thickness with soy milk, soy creamer or water