I was craving one the other day, and decided to make it myself. Researched recipes, bought the correct and excellent ingredients, and tried it for dinner last night.
The baguette was not a "true" baguette, but it was flavorful and delicious. The roast beef turned out beautifully, and the au jus filled our house with delicious aromas. Instead of the traditional Swiss cheese, I used muenster. Who could resist, I mean it's muenster!
My children gobbled it up. I was finally fulfilled - I had created the Platonic perfection of a roast beef au jus sandwich in my very own kitchen!