Once again minhagim shonim. My family did not and does not split meals. it was either milchigs or fleishigs. However, the RAMAH states 494:3 OICHLIM MAACHAL CHALAV VACHAR KACH MAACHAL BASAR UZTRICHIM LHAVI EMAHEM BEIS LECHEM AHL HASHULCHAN. I once heard from a rav in my community that the minhag in Hungary was that the night meals were milchigs and the day meals fleishigs but I know people of hungarian descent who are not noheig that way.
http://hebrewbooks.org/pdfpager.aspx?req=49627&st=&pgnum=203
NOTICE THE RAMAH SAYS CHALAV not gevina.
I dont know anyone who holds milk to be chamar medina.
why would pizza not be “yom tov’dik”? what about baked ziti, lasagne eggplant? my family has enjoyed all of these on shavuous along with blintzes and cheesecake.