Preheat your oven to 425°F (220°C).
Slice the cauliflower into thick 'steaks' by cutting vertically through the core; reserve any loose florets for roasting alongside.
In a small bowl, combine olive oil, turmeric powder, salt, and pepper. Brush the cauliflower steaks and extra florets generously with the spiced oil.
Place the cauliflower on a lined baking sheet and roast for about 25-30 minutes, flipping halfway to ensure even browning and crisp edges.
Meanwhile, toss the cooked chickpeas with a pinch of salt, pepper, and a drizzle of olive oil. Spread them out on a separate baking sheet and roast for 15-20 minutes until crispy.
For the tahini drizzle, in a small bowl combine tahini, lemon juice, and a splash of water if needed to thin the consistency. Adjust seasoning to taste.
Once roasted, arrange the cauliflower steaks on a serving plate. Drizzle them evenly with the tahini sauce, then sprinkle the roasted chickpeas, hemp seeds, and edamame over the top for added crunch and protein.
Serve warm and enjoy this vibrant, nutrient-packed dish for breakfast, lunch, or dinner.