I haven't made one with her grass trim, but I did with the bubble trim. I just made it like a tuxedo bow. Tied off the center and then put my ribbon around the center. Really easy. Not sure if that is how she does it, but mine looked a lot like hers.
Here is a tutorial and I attached a pic of mine and Venus to show the comparison. http://alittlemoore.wordpress.com/20...-bow-tutorial/