Add potatoes and chicken broth to the pot, simmer for 15 minutes until potatoes are tender.
Mix flour and milk until smooth, add to the pot while stirring to thicken the soup.
Add cheese and cooked beef, stirring until the cheese is melted and everything is well combined. Season to taste.
Notes
For optimal storage, allow the soup to cool before refrigerating in an airtight container for up to 3 days or freeze for up to 3 months. Reheat gently to maintain texture.