Preheat the oven to 350 degrees.
In a bowl mix together the turkey, garlic powder, breadcrumbs, milk, and oregano. Season with salt and pepper. Portion the mixture evenly into golf ball sized portions, and roll into balls.
Heat a nonstick pan over medium heat. Once hot, add the oil. Brown the meatballs in the pan on each side. Then place the pan in the oven and cook to an internal temperature of 160 degrees using a thermometer.
In the meantime, toss the couscous with the cumin and smoked paprika, then cook according to the directions on the package. Once cooked, mix in the olive oil, onion, cucumber, tomato, parsley, cilantro, mint, tomato paste, and lemon juice. Season with salt and pepper. Taste and adjust any of the ingredients as needed.
Heat a non-stick pan over medium heat. Warm the pita on both sides to golden brown in the pan. Remove and cut into wedges.
In a bowl whisk the tahini and lemon juice. Whisk in a teaspoon of water until the sauce comes to a smooth consistency.
Serve the meatballs over the couscous with pita. Drizzle with tahini sauce over top. Garnish with cilantro.