I absolutely love Panera and have eaten there since the first day of Phase2. I actually had my first good carb there!
Okay, the Fast Food Guide
lists some specific things that are okay at Panera. I'm sorry I don't remember them all, but it's a bit stricter than I've been with myself. Phase 2 is different for each person as our bodies are different. You'll have to experiment and see what works for your body, okay?
However, I'd think that most of the Tomato Basil bread would be okay, occasionally. I have no trouble with their sourdough bread (something we're allowed occasionally because the acid in the sourdough makes the sugar go into your system more slowly) and the Tomato Basil description says it's their sourdough bread, but with tomatoes and basil. However, it also says it has "sweet walnut streusel topping" and I'd think that would be pretty off plan.
But, if you're only having a couple slices, it might not work out to very much, so see how your body does with it! Personally, though, I'd wait until you've been in P2 for a while, first. It's tough to figure things out if you start P2 off with something that's kind of "iffy."
Here's the nut'l info
for that bread. You can find more nut'l info on bread here
and nut'l info for the regular menu here
(click on the category at the top to go to sandwiches, soup, etc.). Here's their nut'l guide