Cheeseburger Soup

I thought I'd start the recipes out with one of my favorite soups.

1/2 lb. ground beef
3/4 cup shredded carrots
1 tsp dried basil
4 Tbsp butter
4 cups cubed potatoes
2 cups cubed processed cheese
1/4 cup sour cream
3/4 cup chopped onion
3/4 cup chopped celery
1 tsp dried parsley
3 cups chicken broth
1/4 cup all-purpose flour
1 1/2 cups milk

In a large pot, melt 1 Tbsp butter or margarine over medium heat; cook and stir vegetables and beef until beef is brown. Stir in basil ans parsley. Add broth and potatoes. Bring to a boil, then simmer until potatoes are tender, about 10-12 minutes. Melt the remainder of the butter and stir in flour. Add the milk, stirring until smooth. Gradually add milk mixture to the soup, stirring constantly. Bring to a boil and reduce heat to simmer. Stir in cheese. When cheese is melted, add sour cream and heat through. Do not boil.