In which sandwich is cucumber an ingredient?

The sandwich that includes cucumber as an ingredient is the Totally Tuna. This sandwich features a combination of tuna salad, which is made from tuna and mayonnaise, and is topped with sliced cucumbers. The addition of cucumbers provides a refreshing crunch that complements the creamy texture of the tuna salad. This is a distinct element that helps differentiate it from the other sandwiches listed, which do not include cucumbers.

In contrast, the Turkey Tom typically consists of turkey, lettuce, tomato, and mayonnaise, focusing on a classic turkey flavor without the addition of cucumbers. The Spicy East Coast Italian comprises layers of spicy meats and sauces, again not utilizing cucumbers as an ingredient. Lastly, the Vito is an Italian-style sandwich featuring layers of meats and peppers without cucumbers. Thus, the inclusion of cucumber in the Totally Tuna makes it the correct choice for this question.