Steps
Steps:
1. Preheat oven to 350°F.
2. Heat a medium skillet over medium heat. Add the ground beef, breaking it apart with a spoon. Saute for about 5 minutes, add salt and pepper.
3. Add the onions and saute for an additional 3 minutes, stirring occasionally.
4. In a bowl, mix together the ground beef, onions, milk, tomatoes, cooked pasta, Parmesan cheese and butter.
5. Transfer the mixture to an 8x8 inch baking dish, evenly spreading the mixture.
6. Bake uncovered in preheated oven for 25 minutes.
7. Serve and enjoy!