This is your first GSD, yes?Thanks...you seem to understand.
What you suggested is what I've been doing. Not only that but putting her full food bowl on top of her crate to keep it out of reach and build her appetite. I've seen her look up at it when she is hungry but I don't budge from her feeding times.
They can be picky eaters unfortunately, it's best to just stay the course and let 'em learn "eat or starve are your choices". I've gone down the "Shepherd Chef" route after my wife spoiled her rotten (okay I'll admit I may have been slightly involved LOL), and I finally threw up my hands and went back to the basics. I also made her work for her entire meals for a couple days, like laid a scent track with her dinner. That helped a lot.
Trust me it gets way easier not to care, faster than you think. They're not political prisoners on a hunger strike, they'll eat eventually.