In this weeks Parsha,(Bo) there are two foods that should be
1) Korban Pesach
2) ??? (Din in Shulchan Aruch)
Shulchan Aruch (Y.D. 61 – 12) Matnos Kehuno (meats) should be roasted and eaten with mustard.
( should be eaten in a royal manner , like kings eat their food.)
One of the 24 Matnos Kehuno is, the sheep that is used to redeem a first born
donkey, and given to the Kohen. (pidyon peter chamor).