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French dip. In American cuisine, the French dip sandwich, also known as a beef dip, is a hot sandwich consisting of thinly sliced roast beef (or, sometimes, other meats) on a French roll or baguette. It is usually served topped with onions, and a side of au jus (with juice), and that is, with beef juice from the cooking process.
What I did like was the au jus; it had a good beef flavor (more so than the actual beef sadly) and was not too salty. Without it, Arby's French Dip & Swiss Toasted Sub is really just too plain. But for $2, I'd still get Arby's French Dip & Swiss Toasted Sub, if only for the aus jus (yes, I am well aware I'm saying the with juice). I wonder if you can just get the aus jus with one of their other sandwiches...