Musar על חגיגה 53:2

The objective of those prayers is to ask G–d that one may be influenced by the "Heavenly Table." Chagigah 27a teaches us that as long as the Temple was standing the altar, i.e. the sacrifices offered on the altar, were the instruments of atonement for the Jewish people. Nowadays, when we do not have a Temple and an altar, it is our table which has to serve as the instrument for our atonement. The author of Emek Ha-Berachah also states that a heavenly sanctity rests on foods which are pure and permitted.