How do i delete a recipe i submitted?

There isn't a delete per se but you can email and/or send feedback and one of the site administrators can delete it for you. It is an effort to avoid mistaken deletions.

Another option would be to mark the recipe private. This sounds like what you want to do, thereby avoid duplication on the site itself but keeping your variation for later reference.

Hope this helps.

I think you don't have an option to delete once you have posted.