Fry the ground beef in oil, stirring constantly.
Add the diced onion and garlic, stir, cook for 2-3 minutes. Season with salt to taste.
Pour in the tomato puree, stir, cover, and cook over low heat for half an hour.
After half an hour, add the boiled pasta, stir, place in a large baking dish. Sprinkle with cheese and bake for 10 minutes until cheese is melted.