I checked out the link; I see they sell some of the most popular arepas, and they also serve empanadas. We have three favorite plant based fillings at home: coleslaw with avocado, steamed leek with fried plantain and margarine, and Escalivada. My favorite is Escalivada; it goes deliciously with arepas.
It's nice to know you have an arepera in town. Arepas are really inexpensive if we make them at home, so I guess you have to be brave 🙈
S