In a stockpot, cook the beef, onion, green pepper and celery over medium heat until meat is no longer pink and vegetables are tender; crumble the beef; drain., Stir in the beans, tomato puree, salsa, broth, tomatoes, chili powder, Worcestershire sauce, water, seasonings and, if desired, browning sauce. Bring to a boil. Reduce heat; simmer, uncovered, for 30 minutes or until chili reaches desired thickness. If desired, garnish individual servings with chopped onion and shredded cheese.