A traditional Texas breakfast taco starts with egg, potato, and cheese, but from there, it’s a choose-your-own-adventure kind of thing. You can add salsa or diced tomatoes; swap the Colby jack for cheddar or a Mexican cheese like cotija; add bacon, chorizo, or sausage, or beans for a vegetarian version. In short, the correct answer to this question is, “You can put anything you want on breakfast tacos!”