Combine all ingredients in a glass jar with a tight-fitting lid. Shake well. Pour approximately half of the sauce into a small bowl and set aside for the dressing. The rest will be used for basting the chicken.
Arrange chicken on top of the chickpeas and garnish with cilantro leaves and lemon slices. Drizzle everything lightly with a the reserved dressing and serve.
See Café Tips above in the post for more detailed instructions and extra tips.