Preheat oven to 400°F (200°C). In a bowl, combine ground chicken, ricotta, Parmesan, egg, lemon zest, garlic, oregano, salt, and pepper. Mix gently until just combined.
Line a baking sheet with parchment. Roll mixture into 1-inch meatballs and place on the sheet. Bake for 20-25 minutes, until golden brown and internal temp reaches 165°F.
Boil salted water, cook orzo as per package instructions, and add spinach in the last 2 minutes. Drain and return to the pot.
Heat olive oil in a skillet. Sauté garlic and optional red pepper flakes for 1 minute. Add orzo and spinach, toss to coat.
Spoon orzo into bowls, top with meatballs, and garnish with parsley. Add a squeeze of lemon for extra zing.