I used chicken stock and tomato puree in place of the water called for in the P.A.N. recipe to complement the filling.
I stuffed the centers prior to cooking with crumbled Greek feta, forming four patties.
I let them set, covered, while the arepa-maker (arepera) came to temperature; I pulled a rotisserie chicken breast and made an easy dressing of mayo and sriracha.
Bobby Flay made arepas on "Showdown" with a flat griddle, but I haven't de-wheated mine enough to be able to use it safely, yet.