In a large stock pot, brown hamburger and onion until beef is no longer pink. Drain grease.
Add in bell peppers, celery, and garlic. Saute for 2-3 minutes or until peppers start to become tender.
Add in frozen vegetables, beans, potatoes, beef stock, Worcestershire sauce, sugar, seasoned salt, pepper, Italian seasoning, red pepper flakes, and bay leaves.
Bring to a boil, then lower heat and let simmer uncovered for 20 minutes.