Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, ricotta cheese, breadcrumbs, grated Parmesan cheese, egg, minced garlic, dried Italian herbs, salt, pepper, and fresh parsley (if using). Mix until well combined.
Form the mixture into 1-inch meatballs and place them on the prepared baking sheet. You should have about 16 meatballs.
Bake the meatballs in the preheated oven for 20 minutes, or until they are cooked through and have an internal temperature of 165°F (74°C).
While the meatballs are baking, prepare the spinach Alfredo sauce. In a skillet, melt the butter over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant.
Pour in the heavy cream and bring to a simmer. Gradually stir in the grated Parmesan cheese, allowing it to melt into the sauce.
Add the chopped spinach to the skillet and cook until wilted, about 2-3 minutes. Season with salt, black pepper, and a pinch of nutmeg if desired.
Once the meatballs are baked, gently add them to the skillet with the spinach Alfredo sauce. Toss carefully to coat the meatballs in the sauce.
Serve hot, garnished with additional Parmesan cheese and fresh parsley if desired.