In a large saucepan, cook beef, celery, green pepper and onion over medium heat until meat is no longer pink; drain. Stir in the tomato sauce, cornmeal, corn, olives, eggs, chili powder, salt and pepper.
Pour into a well-greased 9x5-in. loaf pan. Bake, uncovered, at 350° for 1-1/2 hours until a thermometer reaches 160°. Serve with taco sauce if desired.