AKDAMUT
On the first day of Shavuot, after the Kohain has been called to the Torah, but before he recites his blessing: The older Minhog which is still retained in many places is to recite Akdomus after the 1st verse of Kerias haTorah, prior to reading of ther 2nd verse.
As far as cheese cake goes, I have unfortunately seen people serve tofuti cheese cake served; This defeats entire purpose of serving dairy dishes, and is just another example of how so many practices have unfortunately become commercialized & cheapened nowadays.