I'm afriad your story doesn't make your point.
God always knew that Bob will order the Martini. Therefor Bob was predestined to order the Martini. Nothing Bob could do or think would change that fact. He thought he was making a decision about which drink, but he was always going to chose the Martini. That's not a choice.
His impression of choice was an illusion.
In your example, this illusion is benign.
In the Garden of Eden scenario, it is totally obscene: God created a temptation for man, that he knew he would take, and then condemned all of his descendants.
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