I made this soup this week and it was quite tasty!  Serena declared that it did taste like a cheeseburger and she really liked it. 

Cheeseburger Soup
slightly adjusted from a recipe at A Zesty Bite

1-1/2 lb extra lean ground beef
1 cup diced white onion
1 Tbsp flour
1/4 cup light sour cream
4 oz. 2% milk Velveeta cheese
20-24 oz. fat free beef broth
1 cup fresh mushrooms, diced up
3 Tbsp tomato paste
1 Tbsp mustard
2 Tbsp Worcestershire sauce
1 cup diced tomatoes
5 slices of cooked bacon, chopped
salt and pepper to taste

In a stock pot, add a little olive oil over medium heat.  Add onions and mushrooms and cook for about 3 minutes.  Add meat and cook until browned.  Add flour, tomato paste, mustard, Worcestershire sauce, and sour cream; stir until everything is coated.  Stir in broth and cheese.  Mix until cheese has melted.  Add soup to bowl and top with tomatoes and crumbled bacon for each bowl.