Looking it up later, I found out it was the new monthly special sandwich! (I also forgot it was the first of the month...) I really liked it so I hope it sticks around for a bit.
The "gazpacho sandwich" consists of "fresh mozzarella, plum tomatoes, cucumber, roasted red peppers, red onions, fresh basil leaves, fresh mint leaves, olive oil and vinegar on a seven grain roll." It was the perfect summer sandwich. Light and refreshing, but still tasty.
I paired it with a chicken barley soup which was also quite tasty:
New soup, new sandwich, both good. Will have to go back at least once this month to make sure I can get another gazpacho sandwich!