Which additional ingredient is included in a Soft Taco Supreme compared to a regular Soft Taco?

A Soft Taco Supreme includes an additional ingredient that enhances both its flavor and texture compared to a regular Soft Taco. Specifically, the inclusion of tomatoes in the Supreme version adds freshness and acidity, which complements the flavors of the seasoned beef, cheese, and lettuce. This ingredient makes the Soft Taco Supreme a more robust option, offering a contrast to the simpler ingredients found in a regular Soft Taco.

Having tomatoes not only enhances the overall taste but also adds a visual appeal, making the dish more inviting. While guacamole, salsa, and pico de gallo are all delicious ingredients typically associated with Mexican cuisine, they are not standard additions to the Soft Taco Supreme. Thus, tomatoes are what differentiate the two tacos, solidifying their status as essential components of a Soft Taco Supreme.