Cook noodles according to package directions. Drain and reserve.
Meanwhile, cook ground beef, onion, and garlic over medium high heat for 6 minutes or until beef is no longer pink. Drain off excess liquid. Stir in oregano, salt, soup, 1/3 c water, and noodles. Remove from heat and add half the cheese. Spoon into 11x7 baking dish and sprinkle the remaining cheese over the top. Bake for 25-30 minutes until bubbly.
Allow to cool for 5-10 minutes before serving.
Note: since making this more often I tend to use Penzey's Pizza Seasoning instead of the spices, use extra cheese, and double all but the meat to freeze casseroles that are less "meaty.".