Cheeseburger Soup I

INGREDIENTS

• 1/2 pound ground beef
• 3/4 cup chopped onion
• 3/4 cup shredded carrots
• 3/4 cup chopped celery
• 1 teaspoon dried basil
• 1 teaspoon dried parsley
• 4 tablespoons butter
• 3 cups chicken broth
• 4 cups cubed potatoes
• 1/4 cup all-purpose flour
• 2 cups cubed Cheddar cheese
• 1 1/2 cups milk
• 1/4 cup sour cream