Roast beef with apple, red onion, spinach and dijon mustard!! UH, ROAST BEEF AND APPLE!!! Why did no one think of this before? Or did they? Does this sandwich have a name? It was super, super good. I can't even describe what a weird and awesome flavor the combination of roast beef and apple has. This sandwich RULED. BTW- I surprised Els for lunch this day, and this sandwich is what she had packed. Like, just a casual, everyday kinda lunch. I think she is kinda crazy.