They sell almond butter here. It tastes horrible. You’re supposed to eat something like a tablespoon of it. We did it once. I’d rather fast two days than eat it again. I don’t even know if it helps.
Water is probably the most important thing, to start hydrating yourself a few days before the fast. And I always try to eat anything with carbs -rather than proteins-that is not salty or sweet the day before the fast.