Cook pasta according to package directions; drain. Cool in single layer on foil. Heat oven to 350 F. In large skillet, brown meat; drain.
Stir together meat, 1 cup mozzarella cheese, eggs, bread crumbs, Parmesan cheese, onion, oregano, salt and pepper. Fill each cooled pasta tube with about 1/4 cup meat filling. Spread thin layer of sauce on bottom of 13x9x2-inch glass baking dish. Place filled pasta in prepared baking dish; cover with remaining sauce. Sprinkle with remaining 1 cup mozzarella cheese and additional Parmesan cheese, if desired. Cover with foil.
Bake 45 minutes or until hot and bubbly.
