Make the meatballs: In a medium bowl, gently stir together the ground turkey, panko, egg, garlic, lemon zest, dill for meatballs, oregano, cumin, salt, and pepper. Shape mixture into 12 equal meatballs, each a mounded 2 tablespoons.

Begin heating a large pot of water.

Heat the olive oil for meatballs in a large skillet over medium-high heat until hot. Add the meatballs and cook, turning occasionally, until the meatballs are browned on all sides and cooked through, about 10 minutes (cut to check). Set aside and keep warm.

While the meatballs brown, cook the orzo in boiling water according to package directions until al dente. Drain, transfer to a bowl, and stir in the olive oil for orzo. Remove some orzo for the children’s plates. Add the lemon juice and dill for orzo to the remaining orzo, and toss to coat. Season to taste with salt and pepper.

For the children’s plates, place the plain orzo, meatballs, and desired vegetables (from the tomatoes, cucumber, olives, and red onion) on their plates. Serve with a side of tzatziki sauce. For the adults' plates, divide the seasoned orzo evenly between serving bowls. Top with tzatziki and meatballs. Toss together the tomatoes, cucumber, olives, and onion and serve with orzo and meatballs.