This is sooo yummy; I'm so glad that Starbucks has come out with another delicious vegetarian sandwich! This is basically like a fancy grilled cheese -- portobello mushrooms are one of my favourite foods, and the red peppers and arugula really add to the flavour, and I'm not sure what kind of condiment/sauce is inside but it's yummy too! The bread is soft and delicious too. Though it's expensive, I consider this to be a treat, and really enjoy eating it, so I could see myself buying it again. I can see myself getting a craving for this in the future! It's definitely one of those sandwiches that you should ask them to heat up.