Preheat oven to 425°F and line a sheet pan with parchment paper.
In a small bowl, whisk together olive oil, lemon juice, lemon zest, garlic, salt, pepper, paprika, garlic powder, onion powder, and Italian seasoning.
Pat chicken thighs completely dry, then rub the marinade evenly over each piece.
Toss potatoes and green beans with olive oil, salt, and pepper.
Place chicken thighs skin-side up on the sheet pan and spread veggies around them in a single layer.
Bake for 25–30 minutes, or until chicken reaches 165°F and potatoes are fork-tender.
Broil for 2–3 minutes (optional) for extra crispy skin.
Rest and serve with pan juices spooned over the top.