Preheat the oven: Heat to 425°F (220°C). Line a large sheet pan with parchment for easier cleanup, or use a lightly oiled roasting pan.
Dry and season the chicken: Pat the chicken dry with paper towels.
Season both sides with 1 teaspoon salt and 1/2 teaspoon black pepper.
Mix the marinade: In a small bowl, combine olive oil, lemon zest, lemon juice, garlic, oregano, thyme, smoked paprika, and red pepper flakes. Stir well.
Toss the vegetables: On the pan, add potatoes, tomatoes, bell peppers, and onion. Drizzle with half the marinade and toss to coat.
Season with a pinch of salt and pepper.
Add the chicken: Nestle the chicken thighs among the vegetables, skin side up. Spoon the remaining marinade over the chicken. Scatter olives around the pan.
Roast: Bake for 35–45 minutes, until the chicken skin is crisp and the internal temperature reaches 165°F (74°C).
Potatoes should be tender and edges caramelized.
Finish: Crumble feta over the pan and return to the oven for 3–5 minutes to soften. Shower with chopped parsley or dill.
Serve: Plate the chicken with a big scoop of vegetables and pan juices. Add lemon wedges if you like extra brightness.