I like to go Dutch here. Forgive me for not including measurements, I just wing it. I'll try to list the ingredients in order of quantity, most at top, just mix it all up in a big bowl. If I'm entertaining, I'll usually make one with chilies and one without.
Smoked Gouda, grated
Mayo
Chopped Pimentos from a jar or two, well drained
Pickled Jalapenos, diced small, optional
Scallions, thinly sliced, before adding these, mix all the previous ingredients up thoroughly, then add the scallions and gently fold them in so they don't get too slimy.