In a large skillet, bring the vegetable broth to a simmer. Add the cream cheese one cube at a time and whisk until smooth. Gently stir in the spinach and cook until spinach is wilted. Stir often to prevent the sauce from burning.
Stir in the cooked pasta and toss to coat in the sauce. Top with the shredded mozzarella and cover until the cheese has melted. Serve and enjoy!