01 - Preheat the oven to 425°F and line a large baking sheet with parchment paper.
02 - Pat the chickpeas dry thoroughly using paper towels to enhance crispiness.
03 - Toss chickpeas in a large bowl with olive oil, cumin, smoked paprika, cinnamon, black pepper, salt, and optional cayenne until evenly coated.
04 - Spread the seasoned chickpeas in a single layer on the prepared baking sheet.
05 - Roast in the oven for 30 to 35 minutes, shaking the pan every 10 minutes for even browning, until golden and crispy.
06 - Remove from the oven and allow chickpeas to cool for 10 minutes to further crisp.
07 - If desired, toss with chopped parsley and lemon zest; serve warm or at room temperature.