The primary ingredient in a typical lasagna is pasta, specifically lasagna sheets. These flat sheets of pasta are layered with other essential components, including meat (often ground beef or sausage), cheese (like ricotta, mozzarella, or parmesan), and tomato sauce or béchamel sauce. The layers of pasta and fillings are assembled in a baking dish and baked until bubbly and golden. While variations exist—such as vegetarian lasagna—the pasta sheets remain the foundational element, providing texture and structure to this beloved Italian dish, which is hearty and comforting.