Eating in a non-kosher restaurant

[Chai]

Is it this?

Soups with beans/pasta

Can you please give us general guidelines as to which soups are OK to have in unsupervised restaurants? E.g., does can it have any beans or pasta? Or it must be only vegetables?

Or this?

Vegan Restaurant in USA

Can one eat in a restaurant that is vegan only and does not serve meat?