Preheat the oven to 400°F (200°C).
In a large mixing bowl, combine the ground chicken, ricotta cheese, breadcrumbs, Parmesan cheese, egg, minced garlic, salt, black pepper, Italian seasoning, and parsley. Mix until well combined.
Form the mixture into 1.5-inch meatballs and place them on a baking sheet lined with parchment paper.
Bake the meatballs in the preheated oven for about 20 minutes, or until they are cooked through and have an internal temperature of 165°F (74°C).
While the meatballs bake, prepare the Spinach Alfredo sauce. In a large skillet, melt the butter over medium heat. Add the minced garlic and sauté for about 1 minute, until fragrant.
Add the spinach to the skillet and cook until wilted, about 2-3 minutes.
Pour in the heavy cream and bring it to a gentle simmer. Stir in the grated Parmesan cheese and season with nutmeg, salt, and pepper. Cook for an additional 3-5 minutes, stirring occasionally.
Once the meatballs are done, gently add them to the spinach Alfredo sauce and coat them well.
Serve the chicken ricotta meatballs warm, garnished with additional Parmesan cheese if desired.