Blend all marinade ingredients until smooth.
Place chicken and marinade in a sealed bag and refrigerate for 2 hours.
Preheat oven to 425°F (220°C).
Add potatoes to a baking dish and coat with half the marinade. Spread evenly.
Place chicken thighs on top, skin side up.
Pour remaining marinade over chicken.
Bake for 10 minutes, then reduce heat to 375°F (190°C).
Continue baking for 45–55 minutes until chicken reaches 185°F internally.
If needed, remove chicken and roast potatoes longer at 425°F until tender.
Rest before serving. Garnish and enjoy your Greek Lemon Chicken and Potatoes.