1. In 12-inch fry pan, cook beef and onions over medium heat until browned. Drain if necessary. Add corn, diced tomatoes, ketchup, KELLOGG'S RICE KRISPIES cereal, salt and chili powder. Simmer over low heat 15 minutes, stirring frequently.
2. Heat tortillas according to package directions. Portion 1/2 cup meat mixture onto half of each tortilla. If using flour tortillas, fold to form soft taco. Garnish with cheese, lettuce, sour cream, tomatoes and salsa, if desired. Serve immediately.