Heat the oven to 400°F. Stir the soup and milk in a small bowl until the mixture is smooth. Cook the beef in a 10-inch skillet over medium-high heat until it's well browned, stirring often to separate meat. Pour off any fat. Stir in the Italian sauce.
Layer half the beef mixture, 3 lasagna noodles and 1 C. soup mixture in a 2-quart shallow baking dish. Top with 3 lasagna noodles, remaining beef mixture, remaining noodles and remaining soup mixture.
Sprinkle with the cheese. Cover the baking dish. Bake for 30 minutes or until the lasagna is hot. Uncover the baking dish. Heat the broiler. Broil 4 inches from the heat for 2 minutes or until the cheese is golden brown. Let stand for 10 minutes.
Prego is the sauce I would use if I didn't make my own. But I do big batches of my sauce at a time for things like this.