In a soup pot, add the ground beef and onion. Over medium heat saute until the meat is browned and the onion is translucent. Drain well.
Add the tomatoes, kidney beans, celery and chili powder to the ground beef mixture. Cover and cook for 10 minutes, stirring frequently. Uncover and add water to desired consistency. Stir in cornmeal. Cook at least 10 minutes more to allow the flavors to blend.
Ladle into warmed bowls and garnish with jalapeno peppers, if desired. Serve immediately.