Preheat the oven to 375 degrees F (190 degrees C).

In a large bowl, combine beef, egg, sour cream and Worcestershire sauce. Stir in soup mix, cheese, and bread crumb until combined; transfer mixture to a 9x5-inch loaf pan. Cover with foil.

Bake in the preheated oven for 45 minutes. Remove foil and continue baking for another 10 to 15 minutes. Let stand 5 to 10 minutes before serving for easier slicing.