A great sandwich as an alternative to a traditional french dip. Deli turkey, sauteed onions and apples for a bit of a sweet flavor. A pretty traditional horseradish sauce, with a bit of a sweet honey and mustard and then a savory/sweet turkey au jus dipping sauce. The au jus and horseradish can easily be made ahead, which makes this just minutes to put together. Serve with some sweet potato fries or potato salad.