Which of the following items contains bacon?

The Guacamole Bacon Burger is the correct choice as it explicitly includes bacon as one of its core ingredients. In this dish, the presence of bacon typically enhances the flavor profile, adding a savory, smoky element that complements the other components, such as the guacamole and the burger patty itself.

House Salad and Asparagus generally do not contain bacon unless specified, while Truffle Tater Tots, although they may have a variety of toppings, usually do not include bacon as a standard ingredient. Thus, the Guacamole Bacon Burger is uniquely identified by its inclusion of bacon, making it the clear answer in this context.