Start by preheating the oven to 350 degrees.
Boil the pasta until it's done.
Meanwhile, heat the olive oil, and add the onion and garlic. Cook until onion is tender.
Add the spinach, and stir and cook until it is wilted.
Add the entire jar of marinara sauce to the pan. Cook for a few more minutes. Taste and add more seasonings if desired.
Place shredded chicken in 9x13 cooking dish.
Blend the cream cheese and cottage cheese together until smooth. Add it to the chicken.
Pour the cooked noodles on top of the cream mixture and chicken, and mix well. This is the bottom layer.
Next, add the marinara and spinach sauce on top of the creamy chicken layer.
Place the shredded mozzarella and parmesan on top!
Cook for 30-45 minutes, or until it's done.
Enjoy!