Cook the Pasta: Boil the pasta according to package instructions until al dente.
Prepare the Meat Sauce: In a pan, sauté onions, add ground beef, and cook until browned. Stir in tomato sauce and season.
Layer the Dish: In a baking dish, layer cooked pasta, meat sauce, and top with béchamel.
Add Cheese: Sprinkle grated cheese on top.
Bake: Bake in a preheated oven until golden brown and bubbling.