What is the vegetarian sandwich option on the menu?

The roasted summer veggie wrap is a suitable vegetarian sandwich option because it typically includes a variety of roasted vegetables, which provides a flavorful and fulfilling meal without any meat. This option is designed to cater to vegetarian dietary needs by focusing on plant-based ingredients while offering a delicious and hearty experience.

Considering the other options, avocado toast is often served as an open-faced dish rather than a sandwich, and while delicious, it does not fit the traditional definition of a sandwich. The caprese sandwich, although vegetarian-friendly, typically contains cheese and may not be as hearty as a wrap. Lastly, a black bean burger, while being a vegetarian item, is classified more as a burger than a sandwich in the traditional sense, and may also be offered in a bun rather than as a wrap. This makes the roasted summer veggie wrap the clear choice for a vegetarian sandwich option on the menu.