About 1 1/2 hours before serving: Preheat oven to 375°F.
In large bowl, with fork, stir veal, carrots, onion, mushrooms, crumbs, salt, pepper, meat sauce with sour cream.
Turn into 9" by 5" by 3" loaf pan.
Bake 1 1/4 hours.
Pour off juices; invert loaf on heated platter; sprinkle with parsley.