Vegan Green Goddess Mac n' Cheese

1 Cook pasta according to package directions.
2 In the meantime, drain the cashews that have been soaking, then add the remaining ingredients to a blender. Blend on high until nice and smooth. May take a few minutes. You may need to scrap down a few times. Taste and adjust seasoning. You can add more lemon juice if it needs more acid. Add salt and pepper to taste. 
3 Once the pasta is cooked, drain and return to the pot. Pour the sauce over the pasta and mix. Serve immediately.