Make the spicy minced beef: Heat a large saucepan over high heat, add the minced meat and the olive oil. Saute stirring often and breaking up any lumps, until it is browned and all the juices have evaporated. Add the spices and stir for 1 more minute, then add the wine and cook for another minute.
Make the filling: Reduce heat to medium and transfer in the a pan the olive oil, the onion, the corn, the peppers. Cook until the onion is soft and then add the minced beef, the beans, the parsley, the green onions, and the tomato. Cook for 2 more minutes and turn off the heat. Add half of the grated cheese, the yogurt and the avocado and mix.
Make the pitacos: Divide the filling to the pitas, fold them in the middle and transfer them to a pan so that the one is next to the other, in order to retain their shape. Top with the remaining cheese and bake for 10 minutes, until the cheese at the top melts.
PRO TIP: Don't be afraid to brown (caramelize) the meat very well. The dark color means great flavor! Remember that the caramelization will start when all the juices of the meat have evaporated.