In a medium bowl, combine first 6 ingredients (chickpeas through turmeric). Toss together until fully combined and taste to adjust spices as needed.
In the bowls you’ll be serving this in, start with a bed of couscous. Then add in seasoned chickpeas, cucumber, red onion, tomato, pine nuts, and arugula.
In a small bowl, whisk together all ingredients for tahini sauce except water. Once mixed well, slowly add water to get desired consistency. Should still be somewhat thick, but thin enough to drizzle.
Drizzle a generous amount of tahini sauce over the top of the bowl and serve!