Prep a 6-quart crock pot with cooking spray.
Add ground beef, onions, celery to a nonstick skillet.
Cook on medium high heat constantly stirring until the ground beef is brown.
Transfer the ground beef, onions, celery to a crockpot.
Add beef broth and canned tomatoes to the crock pot.
Stir well to mix.
Cover the crockpot.
Cook on high for 3-4 hours or on low for 6-8 hours.
About 30 minutes before being served, add the cheese.
Stir to mix the cheese into the soup.