You can't remove a post once it's over 2 hours old.

And what you say might be true, but what you did will always make people think it's just advertising. You need to make it clear why you think it's relevant, and not just post a link to something with no obvious connection to the community.

You've gone some way to make it clearer now, but why not actually write a post saying something like:

    When I've had a tough day working on a project, and
    I'm tired, frustrated, and have a headache coming on,
    I prefer not to take an aspirin.  Instead, here are
    some recipes that I find invigorate and refresh me.

Or something.

Be part of the community and share your personal experience. Don't just post an unmotivated link to an unconnected page.