In a bowl, mix lemon juice, olive oil, yogurt, tomato paste, garlic, paprika, onion powder, and salt.
Rub the marinade all over the chicken, inside and out.
Marinate for at least 30 minutes (overnight is even better).
Preheat oven to 200°C (400°F).
Place the chicken in a baking dish and add ½ cup water to the bottom of the pan.
Cover and bake for 30 minutes.
Uncover and bake another 30 minutes, until the chicken is golden and fully cooked.
Let the chicken rest 10 minutes, then debone and shred it.
Mix the shredded chicken back into the pan drippings.