No, religiously observant Jews won't eat a ham and mushroom Pizza as there are two issues with such a pizza. The first is that the laws of kashrut (Jewish dietary laws) do not allow for the combination of meat and dairy. The second is that pigs are not acceptable as a food animal as they do not meet the requirement of having both split hooves and chewing their cud as specified by kashrut.
Yes, a religiously observant Jew would require that it be cooked in a kosher kitchen and served on kosher dishes.
It's not. pork products can NEVER be kosher. Also, foods that mix cheese with meat can NEVER be kosher.
they can not eat pizza
Foods that Jewish people cannot eat are known as 'non-kosher'.
no
No.
Judaism does not specify when people should eat.
Some people treat mushrooms as vegetables.
some do
yes
Yes.
yes Jewish people eat at a table
Jewish people who keep Kosher do not eat ham because pork is forbidden by their dietary laws. Jewish people who do not keep Kosher can eat ham.
Yes, Moose tend to eat from foods off the ground so if they see a mushroom they are tempted to eat it.
It depends on whether the Jewish person likes celery or not.