Brown ground beef and onion in a heavy skillet. Stir in tomatoes, oregano, salt and
pepper; bring to boil. Simmer uncovered, stirring occasionally, for 20 minutes.
Remove from heat and add mozzarella cheese and 1/4 cup of Parmesan cheese. Let stand 10 minutes.
Meanwhile, cook fettucine. Beat eggs, stir in remaining 1/4 cup Parmesan cheese, melted butter,
parsley and garlic powder. Stir into the hot noodles. Spoon onto tomato
mixture.
Cover and cook over low heat for 15 to 20 minutes, or until set.
Let stand 5 minutes. Serves 4.