this started out as a comment to an answer on this question but I think it might deserve its own question.
We are all(!) agreed that we don't want this to become a recipe swap site, and we know we will continue to get these questions regardless of what we want. It seems, from this question, that the majorities preferred solution is to have a sub-site, like meta, which can be used for these recipe swap questions. From the responses it seems like this is unlikely to happen any time soon, with so many site launching and this needing to be a site specific change.
Robert proposed setting up a (actually supporting the existing) proposal for a recipe swap site, but this seemed to be rejected. I admit I was a nay sayer in the beginning, but i have come round to the idea having seen that it should be simple to migrate between the sister sites1, and even think that having them have separate focuses the sites on the differences, and means that those who don't care for this don't need to be involved and those that only care about recipe swapping (or whatever the scope for that site is) don't need to worry about this site. it sort of makes sense to have different reputations for that site as well.
On SO if you have 3 answers which suggest 3 different things, all with equal votes, but one of them is by Jon Skeet, you know that that one is probably to be trusted. Similarly on the recipe swap site, if someones recipes are consistently voted up, then you know you can probably trust another recipe they have posted. it doesn't necessarily follow that they have good rep on this site that their recipes will be the best. For example if a chef from here with great rep posts a recipe, it might be fantastic, but might need a thermo mixer or blast chiller to get it to come out right.
The proposal as it currently stands doesn't have a great deal of traction, but it seems to me that if we made a concerted effort to reply to recipe requests with something along the lines of:
'Thanks for the question, but recipe requests are considered off topic here. We are focused on questions which can be objectively answered. However, there is a proposal for a similar site focused on recipe requesting. If this proposal gets enough interest it will become a site like this one. Please consider adding your voice to the proposal so the site can get off the ground ASAP. You can read the proposal here: http://area51.stackexchange.com/proposals/11202/recipes and just click the follow button if you decide this is the sort of site you would like to be involved in'
then we could probably help to swell the numbers of relevant people quite quickly.
This would be mutually beneficial I believe.
1 from the comments in the linked question: My concern with having this a seperate site would be how easily it would be to migrate postings between sites -- with Stack Overflow, they can move messages to Super User or Server Fault; will that be possible if it were a completely separate site? Would you have to have a new set of moderators and all of the other overhead for the recipes site? – Joe♦ 2 days ago @Joe: Migration would be equally simple between two paired sites versus site-to-meta migration. No difference. Moderators: Probably different simply due to the commitment of time needed. But there's nothing saying it would have to be separate Moderators. – Robert Cartaino♦ 2 days ago edit