Preheat the oven to 200 °C.
Cook the base if using pearl couscous: cook according to package instructions, drain if needed, then season with lemon juice, olive oil, and a pinch of salt.
Cook the base if using bulgur: place in a heatproof bowl, add twice its volume of boiling salted water, cover and let sit for 20–25 minutes. Fluff with a fork, then season with lemon juice, olive oil, and a pinch of salt. Note: always check the method on your package, as some precooked bulgur may vary slightly in timing.
Prepare the chickpeas: toss the chickpeas with olive oil, ras el hanout, smoked paprika or cumin, sugar or maple syrup, salt and pepper. Spread on a baking tray.
Prepare the vegetables: toss the eggplant, zucchini, and carrots with olive oil, salt, pepper and optionally a pinch of cumin or coriander. Spread on another baking tray.
Roast together: bake both trays at the same time for 20 minutes, stirring halfway through. The vegetables should be golden and tender, the chickpeas crispy. If needed, roast the chickpeas for 5 minutes longer after removing the vegetables.
Make the sauce: mix the tahini, lemon juice, garlic and salt. Gradually add the water until smooth and creamy.
Assemble the bowls: divide the base (couscous or bulgur) into two bowls. Add the roasted chickpeas and vegetables. Add a small handful of arugula, young shoots or spinach. Drizzle with the tahini-lemon sauce.
Finish: sprinkle with pomegranate seeds, toasted pine nuts and fresh cilantro. Serve immediately.