1. Preheat the Oven:
Set oven to 425°F (220°C).

2. Mix the Marinade:
In a bowl, combine chicken, olive oil, mustard, garlic, lemon zest, salt, and oregano. Mix well. Let it marinate for at least 1 hour or overnight.

3. Build the Skewer Setup:
No spit? Cut an onion in half, place flat side down on a baking sheet lined with parchment, and insert two wooden skewers upright into each half.

4. Stack the Chicken:
Layer the marinated thighs onto the skewers, flipping each piece for even stacking. Pour water or stock into the base of the pan.

5. Roast the Chicken:
Cover the top with foil if needed. Bake for 75–90 minutes until fully done and golden on the outside.

6. Rest and Slice:
Let the chicken rest briefly. Slice thin and serve.