I didn't see any option for that. I had it, though, and LOVED how rare it was. It was absolutely delicious. Problem was, I also had the French Onion Soup, as I grew up eating that, and that was the best I've ever had. It was way too much food! I couldn't eat half my sandwich and only had a couple fries. Such a waste of great food.
If you don't like roast beef rare (blasphemy) I've heard the turkey is good too! (you know I'm joking - to each his own!). My daughter had the croque monsieur and it was too heavy on the ham - not the best. Basically a grilled ham & cheese but thick ham - not authentic at all.