FIRST STEP: In a 12” frying pan, thoroughly cook ground beef. Drain fat and set aside for now
SECOND STEP: In a large 5-Quart pot with 1 tablespoon of the butter over medium-high heat, sauté carrots and diced celery with Italian seasoning, oregano, salt and pepper (2-3 minutes)
THIRD STEP: Add in beef, potatoes, and chicken broth to the pot. Reduce heat to low, cover with lid and simmer for 10-12 minutes (until potatoes are tender)
FOURTH STEP: In a separate small frying pan, melt the remaining 3 tablespoons of butter over medium high heat and stir in flour until it starts to bubble (2 minutes) then add this mixture to the soup stirring well to mix
FIFTH STEP: Stir in cheese until fully melted.
SIXTH STEP: Add in milk, and bring back to a simmer.
SEVENTH STEP: Stir in sour cream until well mixed. Then remove from heat and serve hot