Preheat the oven to 400°F. Line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, ricotta cheese, Parmesan cheese, breadcrumbs, egg, garlic, oregano, salt, black pepper, and red pepper flakes. Mix until well combined.
Using your hands, form the mixture into meatballs, about 1.5 inches in diameter, and place them on the prepared baking sheet.
Bake the meatballs in the preheated oven for 20-25 minutes, or until they are cooked through and golden brown.
While the meatballs are baking, heat the olive oil in a large skillet over medium heat. Add the chopped spinach and sauté until wilted, about 2-3 minutes.
Pour in the heavy cream and bring to a gentle simmer. Stir in the mozzarella cheese until melted and smooth. Season with salt and pepper to taste.
Once the meatballs are done, add them to the skillet with the spinach Alfredo sauce. Gently toss to coat the meatballs in the sauce.
Serve hot, garnished with additional Parmesan cheese if desired.