I made one for a certain baby shower a couple of weeks ago...

1 block philly
1 cup mozza
1 cup cheddar
1 cup cream
1/2 onion finely diced
(if so desired a couple of rashers of bacon diced)

Pull out the bread from the cob, mix all the ingredients together till somewhat smooth (I use my kitchen aid) put in and cook on 180 for about 40 mins, stirring occasionally. Serve and be sure to get in with a taste first, as it goes quick! (ours always does!)