According to the great tzaddikim, eating on erev Yom Kippur atones for all the meals you ate without the proper intention all year.  Since the purpose of eating on erev Yom Kippur is to give you strength to fast on Yom Kippur, the meals on erev Yom Kippur have the power to restore and instill kedusha into the meals of the entire year. ~ Sfas Emes as quoted by R’ Dovid Meisels

G’mar Chasima Tovah!