Cheeseburger Soup

I got this recipe from Nancy Evans.

1 lb ground beef (already cooked saves time)
1/2 cup chopped onion
3/4 cup shredded carrots
3/4 cup diced celery
1 tsp basil
1 tsp parsley flakes
4 Tbs butter divided
3 cups chicken broth
4 cups diced peeled potatoes,cut small to cook faster (A time saving option is to add shredded hashbrowns instead of the cubes)
1/4 cup flour
8 oz cubed Velveeta cheese (finely shredded cheddar works OK)
1 1/2 cups milk
3/4 tsp salt
1/2 tsp pepper
1/4 cup sour cream

In a 3 quart saucepan brown beef, drain, and set aside.
Saute onion, carrot, celery, basil and parsley in 1 Tbsp of butter for 10 minutes.  Add chicken broth, potatoes, and beef and bring to a boil.  Reduce heat, cover, and simmer until potatoes are tender (15-20 min).  Stir in cubed cheese until melted.  Keep on low heat.

In another pan melt the leftover butter with the flour and cook for about 1 minute while stirring.  Stir in the milk until thick and smooth.  Bring to a boil then pour into the soup and stir until mixed.  Serve with a dollop of sour cream.  Top with diced tomato.