Question

Hello Rabbi, is there any permission to eat at a vegan restaurant abroad?
I thought of several possible problems: (a) vinegar produced from wine that is forbidden; (b) food cooked by non-Jews. For this reason, only foods that became fit for eating through cooking, or that are served on a king’s table, were forbidden. What about a food that meets only one of those criteria? (c) eating from the restaurant’s utensils. Would it be permitted to bring disposable utensils from outside and thereby allow it?
 
Thank you.