In your slow cooker, add diced potatoes, chopped onion, diced celery, carrots, parsley and basil. Add chicken broth. Cook on low 6-8 hours or high 4-6 hours or until potatoes and veggies are tender.
About 30 minutes before it is done, cook the ground beef in a medium saucepan for 4-5 minutes until brown. Remove and set aside.
In the same pan, add the butter. Melt the butter, add the flour, and cook until bubbly. Add the salt, pepper, milk, and sour cream.
Add cream mixture, cheese, and ground beef to the crockpot. Stir and and continue to cook until the cheese is melted. Serve with optional toppings.