A few low-carb options, if you're creative
Since they serve breakfast all day, my first choice is the spinach omelet. It comes with a side order of bread (pancake, toast, etc.), which I usually save in a to-go box for the bottomless pits with whom I live. Also, I like their coffee, and they do have Splenda available, but you have to ask for it.
Option B, for me, is the spinach & bacon salad, sans croutons. Unfortunately, I can't find a nutritional breakdown on the salad dressings, but I do like the creamy vinaigrette.