Add ½ cup of marinara sauce to the bottom of the loaf pan. Spread to cover the bottom.
Add noodles to cover the sauce, break if needed.
Add ½ of the cheese mixture on top of the noodles.
Add ½ of the meat mixture on top of the cheese mixture.
Add another noodle layer.
Add the rest of the cheese mixture, then the rest of the meat mixture.
Add the final noodle layer. Then add ½ cup of marinara sauce on top. Then finish with the remainder of the mozzarella and Parmesan cheeses.
Cover with foil and bake in preheat oven for 30 minutes. Remove the foil and bake for another 10-15 minutes until it's hot and bubbly!
Let it sit 10 minutes before serving.