Prepare the Chicken Meatballs: Preheat the oven to 400°F (200°C). In a large bowl, combine the ground chicken, egg, crumbled feta, dried oregano, basil, onion powder, garlic powder, dill, parsley, salt, and pepper.
Form the Meatballs: Using your hands or a small ice cream scoop, shape the chicken mixture into 1- to 1.5-inch meatballs. Place the meatballs on a lined baking sheet and bake for 15-18 minutes, or until fully cooked and golden brown.
Cook the Orzo: While the meatballs are baking, cook the orzo according to the package instructions. Drain and return the cooked orzo to the pot.
Prepare the Lemon Orzo: To the cooked orzo, add the lemon zest, fresh lemon juice, olive oil or melted butter, parmesan cheese (if using), dried oregano, garlic powder, salt, pepper, and dill. Stir until everything is well combined, and adjust the seasoning to taste.
Serve: Serve the Greek chicken meatballs over a bed of lemon orzo. Garnish with additional fresh herbs, lemon wedges, or extra parmesan cheese if desired.