It's everywhere and it's on everything. You go to a nice place for dinner or lunch and open up the menu. You see the different titles on each page, pizza, pasta, hamburgers, etc. And then under each title there is a list of what different options are available. In the US you would nomally see the pizza heading then it dives into the different pizza's that are offered like pepperoni or hawaiian. But no, not here. The first thing offered is a pizza with jamon y queso. Then every option below that one is a jamon y queso pizza with more added on to it.
You look at the hamburgers. It doesn't say anything about jamon y queso... So you think your in the clear. But in reality Hamburgers here automatically come with jamon y queso standard. Then you can add things such as a fried egg onto it among many other un-natural options.
In short, I don't really mind ham and cheese. Actually I really like ham and cheese. It is a good thing. But there is such a thing as too much of a good thing.