
"Hunger Modifier" is how much hunger is replenished from eating a piece of food relative to its base. For instance, if the base hunger replenished by a piece of cheese is 40, then you will only replenish 9.5% of that number when feasting from this table (3.8 units of hunger). This allows you to eat more at a time and gain more FEP's in one sitting.
"Food Event Bonus" is the increase in FEP's you gain by feasting on foods. This table gives +78%, so a piece of cheese that gave 55 strength FEP's will now give 97.9 strength FEP's.
The plates and cups and whatnot, collectively known as "Symbel items", are the items that contribute towards these two values, decreasing hunger modifier and increasing food event bonus.
Of another era.