Can vegetarians eat steak and onion crisps?

Chips are made from potatoes as such generally are vegetarian.

simply put the potato, a tuber, is a vegetable.

The current manufacturing of the potato chip falls into two general categories, frying or baking. the frying is usually done in vegetable oil, peanut etc.

Please note that some have Meat flavoring. This does not mean they contain meat at all. You would have to read the ingredients to be sure.

Additionally, chips, the English version, are vegetarian, as they are nothing more than what Americans call french fries.