Cheeseburger Soup

Ingredients (15)

• 1 lb ground beef
• 4 tbsp unsalted butter
• 1 medium white onion
• 3/4 cup carrots
• 3/4 cup celery
• 1 tbsp italian seasoning
• 1/2 tsp oregano
• 1 tsp salt
• 1/2 tsp black pepper
• 3 large russet potatoes
• 3 cup chicken broth
• 1/4 cup all-purpose flour
• 4 cup sharp cheddar cheese
• 1 1/2 cup milk
• 1/4 cup sour cream