Diana Henry is an author that we have produced a complete recipe index for (you can view all those authors from the link at the bottom of the filters on Library REcipes). This means we have indexed all her books, her newspaper and magazine columns, and as many online recipes as we can find. We do the same for several NYT columnists - Melissa Clark, Mark Bittman, Ottolenghi, Dorie Greenspan and David Tanis.
The NYT site has a huge number of recipes and we have indexed many of them - 6,138 to be exact - but we don't have the resources to index all the output of every newspaper's food pages. Members can add any online recipe that they want on their Bookshelf, using the Bookmarklet.