To make the hummus, combine the chickpeas, tahini, olive oil, lemon juice, garlic, salt, cumin, curry powder, cayenne, and cilantro (if using) in a food processor. Purée until smooth and transfer to a serving dish.
To make the chips, preheat the oven to 350°F. Line a baking sheet with parchment paper and lightly spray with vegetable oil spray.
Arrange the sweet potatoes in a single layer on the baking sheet. Spray the potatoes with the vegetable oil spray and sprinkle with salt and black pepper. Serve the chips with the hummus.
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