Place a large skillet over medium heat and add ground round. Cook, breaking up with a wooden spoon, until no longer pink.
Add both cans of tomatoes, tomato paste, salt, sugar, Italian seasoning, and pepper. Stir to mix and let simmer over low heat while you get the rest of the ingredients ready.
Preheat oven to 350 degrees. Cook egg noodles according to package directions and drain well.
In a medium bowl, stir together noodles, green onions, sour cream, and cream cheese.
Spoon noodle mixture into a greased 13X9-inch baking dish. Top with beef mixture. Sprinkle with cheeses.
Spray a piece of aluminum foil with cooking spray and place cooking spray side down on top of baking dish to cover.
Bake for 35 minutes. Uncover and bake 5 more minutes.