4. Combine Beef and Noodles:
– Once the beef mixture has cooked, add the cooked noodles to the skillet.
– Stir to combine the noodles with the beef and sauce.

5. Add Cheese:
– Preheat your oven to 350°F (175°C).
– Transfer the beef and noodle mixture to a large baking dish.
– Sprinkle the shredded mozzarella and Swiss cheeses evenly over the top.

6. Bake:
– Place the baking dish in the preheated oven.
– Bake for about 20 minutes, or until the cheese is melted and bubbly.

7. Serve:
– Remove from the oven and let it cool slightly.
– Garnish with fresh parsley, if desired.
– Serve hot and enjoy!

Feel free to adjust the seasonings and ingredients to suit your taste preferences. Enjoy your delicious French Onion Beef and Noodles!