Baked Rigatoni

Bahan-bahan (8 porsi)

• 1 pound lean ground beef
• 1 medium onion (diced)
• 1 tablespoon Italian seasoning
• 3 cloves garlic (minced)
• ½ teaspoon salt (or to taste)
• ¼ teaspoon black pepper
• 5 cups pasta sauce (approximately two jars)
• 1 pound Rigatoni pasta (plus ½ cup pasta water )
• 2 cups shredded mozzarella cheese