While the beef is cooking, make the arepa dough.
In a bowl combine the corn flour, salt and water. Knead for 2-3 minutes until you get a uniform dough. The dough should be soft and slightly sticky but not too wet.
Let the dough rest for 20 to 30 minutes, covered with a tea towel.
Divide the dough into 6 equal portions.
Preheat oven to 350 F.
In a griddle pan add the oil and place 2-3 arepas and cook for about 3 minutes per side. To flip them use a fish spatula to help you release the arepa from the pan.
If the arepas are sticky or don't release from the pan easily that means that they need more time to cook and form a crust.
Flip the arepas and cook on the other side. Remove them from the pan and place them on a baking sheet.
Bake the arepas at 350F for about 5-8 minutes.
Remove them from the oven and allow them to cool down.
While the arepas cool down, shred the beef with 2 forks. The meat should fall apart and be tender. If you have too much liquid in the beef, you can turn on sauté mode and reduce the liquid in half.
Once the arepas are cool enough to handle, use a pairing knife to cut a pocket but don't slice all the way thru. I like to wrap the arepas in a piece of parchment paper to hold them together.
Add a spoonful of hogao, guacamole, cheese and top with the shredded beef.
Serve and enjoy.