How would you suggest approaching this on the grill? How high should I turn it up? How many minutes per side? Thanks.

Hi Faye, check out the blog post for the recipe: http://food52.com/blog/1792-sugar-steak-with-bourbon If you scroll down, you'll see Katy's version of sugar steak below Amanda's, and it includes grilling instructions (for a thicker cut of beef -- so you'd need to scale back the cooking time if you stick with flank steak as Amanda did).