In a large skillet, cook the beef, onion and garlic over medium heat until meat is no longer pink, 5-7 minutes; crumble beef; drain. Stir in oregano and basil. , Preheat oven to 350°. Place 8 wonton wrappers on a greased baking sheet; top each with 1 tablespoon meat mixture and 1 tablespoon mozzarella cheese. Moisten edges with water; top with another wonton wrapper. Press edges with a fork to seal. Repeat with remaining wrappers, meat mixture and cheese. , Brush wontons with butter. Sprinkle with Parmesan cheese if desired. Bake until golden brown, 10-12 minutes. Serve with spaghetti sauce.