01 - Preheat oven to 425°F. Line a large rimmed baking sheet with parchment paper for easy cleanup.
02 - In a large mixing bowl, whisk together olive oil, lemon juice, garlic, oregano, thyme, red pepper flakes, salt, and black pepper.
03 - Add chicken thighs to the bowl and toss to coat thoroughly with the marinade.
04 - Place chicken thighs, skin side up, on the prepared baking sheet. Scatter artichoke hearts, red onion wedges, red bell pepper, olives, and lemon slices around the chicken. Drizzle any remaining marinade over all ingredients.
05 - Roast for 35 minutes, or until chicken is golden brown and cooked through (internal temperature should reach 165°F).
06 - If desired, broil for an additional 2-3 minutes to crisp the chicken skin.
07 - Remove from oven and let rest for 5 minutes. Garnish with extra fresh oregano before serving.