To prepare an unstuffed pepper skillet recipe, first you need to prepare the peppers. First, you will need a large skillet, preferably cast iron. You can use any type of skillet you like, as long as it is non-stick. Then, heat the oil in the skillet over medium-high heat. Add the onion and cook until softened, about 5 minutes. Next, add the chili powder, cumin, oregano, salt, and pepper to taste. Cook, stirring frequently, until the spices are lightly browned and the onions are translucent, 2 to 3 minutes more. Remove the pan from the heat and stir in 2 tablespoons of the sour cream. Stir in 1 tablespoon of chopped parsley and 1 teaspoon of kosher salt. Simmer the mixture, covered, for 1 to 2 hours.