Preheat your oven to 400°F (200°C).
In a large bowl, mix olive oil, turmeric, rosemary, garlic, lemon zest, lemon juice, salt, and pepper.
Add the chicken thighs to the bowl. Rub the marinade all over the chicken, including under the skin if possible.
Place the chicken skin-side up in a baking dish or sheet pan.
Add any optional vegetables around the chicken. Scatter lemon slices on top.
Bake uncovered for 40–45 minutes, until the skin is golden and the chicken is cooked through.
For extra crispy skin, broil for 2–3 minutes at the end. Watch closely.
Rest for 5 minutes before serving.