1. Can I go to any non kosher pizza store in the world and order cheese pizza? (assuming it’s a vegetarian pizza, meaning no meat including no rennet in the cheese)

2. Also, can I get any fruit or vegetable toppings onions and tomatoes for example?

3. What about onion rings or fries?

3. A specific example: where I live in New York there’s a dominos pizza that’s about a 5 minute walk away from my house, the closest certified kosher pizza store is a 20 minute drive away. It would be a lot more convenient whenever I want to get pizza to be able to get from dominos. Does it matter if I have a certified kosher option that’s somewhat near me, or I can have kosher pizza from a non kosher pizza store whenever?