Spread the thawed spinach between a couple layers of paper towels, press to squeeze out excess liquid, and then roughly chop. Set aside.
2 10 oz pkg frozen spinach
Cook the pasta according to package instructions until al dente. Drain, and set aside.
1 lb penne pasta
Add both the soup and milk to a large skillet set over medium low heat. Once the mixture's warm, add the cream cheese and mozzarella. Continue cooking, stirring often, until the mixture's smooth and everything's evenly incorporated.
1 23 oz can condensed cream of mushroom soup, 8 oz cream cheese, 2 1/3 cups milk, 10 oz shredded mozzarella cheese
Add the spinach, seasonings, pasta, and parmesan cheese to the skillet. Stir everything together until evenly combined.
freshly ground black pepper, 1 tsp garlic powder, 1/2 tsp onion powder, 1/8 tsp freshly ground nutmeg, 1/2 cup grated parmesan cheese
Serve warm, and enjoy!