Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a mixing bowl, combine the ground chicken, ricotta cheese, breadcrumbs, grated Parmesan cheese, egg, minced garlic, parsley, salt, black pepper, and Italian seasoning. Mix until well combined.
Form the mixture into meatballs, about 1.5 inches in size, and place them on the prepared baking sheet.
Bake the meatballs in the preheated oven for 20 minutes or until cooked through (internal temperature should reach 165°F or 75°C).
While the meatballs are baking, heat butter in a large skillet over medium heat and add minced garlic. Sauté for about 1 minute until fragrant.
Add the chopped spinach to the skillet and cook until wilted, about 2-3 minutes.
Pour in the heavy cream, stirring continuously. Bring to a gentle simmer.
Stir in the grated Parmesan cheese and season with salt, pepper, and optional nutmeg. Continue to stir until the cheese is melted and the sauce is smooth.
Once the meatballs are done, carefully add them to the skillet with the spinach Alfredo sauce. Gently stir to coat the meatballs in the sauce.
Allow to simmer for an additional 5 minutes, ensuring everything is heated through.