Preheat oven to 200 degrees C. Line a baking tray with aluminium foil.
Stir together the chickpeas, lemon juice, olive oil, brown sugar, cumin, coriander, cinnamon, garam masala, black pepper, cayenne pepper and salt in a mixing bowl. Spread the chickpea mixture in a single layer on the prepared baking tray.
Roast in the preheated oven until the chickpeas are dark brown in spots, crisp, and have shrunk quite a bit, 25 to 30 minutes, stirring halfway through the cooking time. Cool to room temperature before serving.