Preheat your oven to 425℉/220°C. Chop the carrots and cauliflower into bite-sized pieces, line a baking sheet with parchment paper, and spray it lightly with oil. Spread the vegetables in a single layer, coat with olive oil and a spice mix of garlic powder, oregano, paprika, cumin, salt, and black pepper. Roast for 25-30 minutes until tender; add lemon juice and parsley before roasting until golden brown.
Prepare another baking sheet lined with parchment paper for the chickpeas and sweet potatoes. Rinse and drain the chickpeas, dry them, and discard any loose skins. In a bowl, combine chickpeas with olive oil and spices until coated. Place chickpeas on one side of the baking sheet, add diced sweet potatoes, and roast together for about 20-28 minutes.
In a food processor or blender, combine tahini, Greek yogurt, lemon juice, olive oil, minced garlic, cumin, and salt. Blend until smooth; add water gradually for desired consistency.
Assemble by adding tahini yogurt sauce at the bottom of each serving dish, followed by layers of arugula, roasted sweet potatoes, carrots & cauliflower mixture, and crispy chickpeas. Add your favorite toppings and squeeze fresh lemon juice over everything before enjoying.