[Alfonso]

LOL. Maybe you're right. I'm just trying to explain that, as it's not very common to say ¿qué trae el sandwich? and, in this case, you are using the language in a forced way, a derogatory nuance is easily conveyed, meaning, for example, what you could imagine (I gave you two examples, but it doesn't matter which one you choose apart from them). But I also said, upper or lower, that the same phrase said with a sincere and frank smile will not have an ironic or sarcastic meaning.
So, I think a proper way will be ¿Qué lleva el sandwich? But you cannot say that ¿Qué trae el sandwich? is incorrect.