I think the question here is – Did Chazal say that it is ossur to cook for a goy on YT (which the wolf maintains) or did they say It is ossur to invite a goy for yom tov as you may come to cook for him (as chesed is stating but not really explaining properly). If it is the former than serving deli sandwiches will make inviting a goy muttar. If it is the latter then it won’t help because once a gezeira is made you can’t necessarily say – well that won’t be the outcome in this case so it’s OK.
However as I am not a Rabbi or poseik I won’t comment. Although even in the later case there may be a way of getting around it if necessary. So back to the LOR