The hammer was the last resort lol. I was not about to call the plumber. I will be more careful in the future about drain sized dishes.
I just did the same thing today, in fact just now. I filled the sink with hot water and soap suds first. Then I got the trusty bathroom plunger and used it. After a few times the bowl came out. I think the hot water and soap suds helped as it made the bowl silppery enough to slide right out.
Thanks to all of your for your suggestions.
Before reading this I was going to use a hammer and screwdriver to break the bowl.