Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, breadcrumbs, parsley, dill, oregano, garlic, feta cheese, egg, lemon juice, salt, and pepper. Mix gently until everything is evenly incorporated, being careful not to overwork the mixture.
Roll the mixture into 18 to 20 evenly sized meatballs, about 1½ inches in diameter, and arrange them on the prepared baking sheet.
Bake for 18–20 minutes, or until the meatballs are lightly golden and reach an internal temperature of 165°F (74°C).
While the meatballs are baking, bring the chicken broth to a boil in a medium saucepan. Add the orzo, reduce the heat to low, cover, and simmer for 10–12 minutes until the liquid is absorbed and the pasta is tender.
Remove the cooked orzo from the heat and stir in the fresh lemon juice and olive oil. Fluff with a fork until light and tender.
Divide the lemon orzo among serving plates, then top with the warm Greek Chicken Meatballs with Lemon Orzo. Finish with chopped parsley and extra crumbled feta before serving.