01 - Preheat the oven to 425°F.
02 - Line a large baking sheet with parchment paper or lightly grease the surface.
03 - Combine potatoes, red onion, carrots, and garlic in a large mixing bowl. Toss with half the olive oil, half the salt, black pepper, rosemary, thyme, and paprika until evenly coated.
04 - Spread the seasoned vegetables in an even layer over the prepared baking sheet.
05 - Rub chicken thighs with the remaining olive oil, salt, black pepper, rosemary, thyme, and paprika. Place chicken thighs skin-side up on top of the vegetables.
06 - Roast for 40 minutes, or until the chicken skin is golden and potatoes are fork-tender. For crispier skin, broil for an additional 2 to 3 minutes if desired.
07 - Remove the pan from the oven and let rest for 3 to 5 minutes. Sprinkle with chopped parsley before serving, if desired.