Originally Posted by solipsism
1) it’s not uncommon for restaurants to have alternate menu options for those with particular diets.
2) It’s not uncommon for restaurants to allow customers to substitute items, or pizzerias to make your own pie.
3) Could Steve’s doctor told him he needs to alter his diet to maintain his weight?
I would tend to agree with you, however, some of the most common reasons for becoming a vegan are ethical commitment or moral conviction concerning animal rights or welfare, the environment, and spiritual or religious beliefs. I believe SJ become a vegan due to his spiritual beliefs, so would only change his diet to suit all the requirements of a vegan.
Not only is cheese-free pizza and egg-free pasta (not using any milk I might add) a little difficult, it must be prepared using utensils, pots, pans etc that have never touched any animal products it must also be cooked in ovens that also has not cooked meat.
It looks like this place prides itself on "salami (that) is made in house, most of our meat comes from whole animals (which we butcher ourselves and utilize in their entirety)" so would be a bit of a stretch to accommodate all the requirements of a vegan. But, hey, I could be wrong.