Preheat your oven to 400°F (200°C).
In a large mixing bowl, combine olive oil, minced garlic, lemon juice, lemon zest, dried oregano, salt, and black pepper.
Add the chicken thighs and potato wedges to the bowl and toss to coat them evenly with the marinade.
Arrange the chicken and potatoes in a single layer on a baking sheet.
Bake in the preheated oven for 45 minutes, or until the chicken is cooked through and the potatoes are golden and crispy.
Serve hot, garnished with fresh parsley if desired.