Best to personally prepare the food one enjoys most:
It is best that one personally involves himself with the preparations of the food that is most enjoyed by him.
 Admur 250 Kuntrus Achron 2
 This is done in order so one also benefit from the Mitzvah of “better to perform a Mitzvah personally than through a messenger” in the item of which the actual Mitzvah of Oneg Shabbos is being performed with. [Admur ibid]