Where does “pasticcio” come from?

pasticcio (Italian) comes from Vulgar Latin pasticium, from Vulgar Latin *pastīcius, from Latin pasta, from Ancient Greek παστά, from Ancient Greek παστός, from Ancient Greek πάσσω, from Proto-Indo-European kʷeh₁t- — to shake.

pasticcio (Italian): pie, pasty; mess, confusion; relief