Heat the canola oil in a large skillet over a medium-high heat. Cook the onions and peppers until onions are softened and peppers are slightly charred, about 8 minutes. Add the black beans and cook until warmed through, another 3 minutes. Season with salt and pepper and transfer to dish.
Whisk the eggs together and stir in the cheese. Heat canola oil in the skillet and reheat the skillet over a medium heat. Reduce heat to low and add the eggs, scrambling until cooked through, about 3 minutes. Put the eggs and the beans inside the Pita. Then put some sour cream on top if you want to. Enjoy!