Preheat a medium sauté pan over medium heat. Add 1 teaspoon of oil to the preheated pan. Add the diced onions and chorizo sausage to the pre heated pan. Cook the onions and chorizo until the onions are translucent and the chorizo is golden brown. Add the bell pepper, corn, and chili powder to the pan. Continue to cook for two to three minutes. Season the ingredients in the pan lightly with salt and pepper. Remove ingredients from heat and add them to a medium-sized mixing bowl. To the mixing bowl add cornmeal, cheese, cilantro, egg, and 1/4 cup of water. Mix ingredients thoroughly; add a little more water if necessary so the stuffing is moist.