In a blender or food processor, add the cilantro, parsley, avocado, green bell pepper, jalapeno, onion, garlic, lime juice, white vinegar, canola oil, Knorr chicken seasoning, salt, and pepper and blend until smooth.
In a bowl, mix water and salt. Pour in flour slowly and mix with a spoon until ingredients have incorporated. Let it stand for 5-7 minutes. Knead for about 5 minutes, then break the dough into 8 equal-sized portions. Heat canola oil in a pan over medium low heat. Flatten the dough into a disc shape and pan fry on each side until golden, about 3 minutes.
Heat grill to medium high. Sear steak on both sides and cook to desired temp, slice thinly. Cut the arepas to create a pocket and fill with meat, black beans, avocado, cheese, and Guasacaca sauce. Serve and enjoy!