Preheat the oven to 400°F (200°C).
Roast the Cauliflower: Toss cauliflower florets with coriander, turmeric, cumin, olive oil, and salt. Spread on a baking sheet and roast for 40 minutes, flipping halfway through, until golden and tender.
Make the Crispy Rice: Mix cooked rice with harissa sauce and spread in an even layer on a parchment-lined baking sheet. Roast for 40-45 minutes, turning the pan halfway through, until crispy. Let cool slightly and break into small pieces.
Roast the Chickpeas: Toss chickpeas with coriander, cumin, olive oil, and salt. Spread on a baking sheet and roast for 25 minutes, shaking the pan halfway through, until crispy.
Pickle the Onions: Whisk lime juice and honey in a small bowl. Add sliced onions, ensuring they are submerged, and let sit for at least 1 hour.
Prepare the Tahini Dressing: Whisk tahini, water, honey, and lemon juice in a bowl until smooth and is the consistency of honey.
Assemble the Salad: In a large bowl, combine roasted cauliflower, roasted chickpeas, crispy rice, chopped dates, toasted almonds, crumbled feta, and pickled onions. Sprinkle with cilantro and parsley. Drizzle with half of the tahini dressing and gently toss to combine. Add more dressing if desired. Serve immediately.