Which ingredient is NOT a part of the Spicy Potato Soft Taco?

The Spicy Potato Soft Taco features a combination of ingredients that highlight the unique flavors of the dish. The main ingredients typically include seasoned potatoes, lettuce, cheese, and chipotle sauce, which adds a moderate heat and smoky flavor to the taco. Ground beef is not included in this specific menu item, making it the ingredient that does not belong. The focus on potatoes as a protein source distinguishes this taco from many others on the menu that commonly use meat options like ground beef.