Preheat the oven to 425°F (220°C) if you need to roast vegetables. (High heat encourages caramelization — the Maillard reaction — which concentrates sweetness and builds flavor.) If your sweet potato, zucchini and bell pepper are already roasted, you can skip to step 3.

Roast the vegetables: toss 3 cups cubed sweet potato with 1 tbsp olive oil, 1/2 teaspoon salt and 1/2 teaspoon smoked paprika on a rimmed baking sheet; spread in a single layer and roast for 20–25 minutes until edges are golden and tender. On a separate sheet, toss 2 cups zucchini slices and 1 large bell pepper (sliced) with 1 tbsp olive oil, 1/2 teaspoon ground cumin and a pinch of salt; roast 12–18 minutes until golden and slightly blistered. (Roasting at high heat caramelizes sugars in the vegetables and creates contrasting textures — soft interior with crisp edges.)

Cook the quinoa: rinse 1 cup dry quinoa in a fine sieve under cold water to remove the bitter saponins. Combine rinsed quinoa with 2 cups water and a pinch of salt in a small saucepan; bring to a simmer, reduce to low, cover and cook 15 minutes. Remove from heat and let rest covered 5 minutes, then fluff with a fork. (Rinsing prevents bitterness; letting it rest steams the grains for light, separated fluff rather than gluey clumps.)

Prepare the chickpeas: if using canned chickpeas, drain and rinse 2 cans (about 480 g drained). Pat dry with paper towels. Heat a large skillet over medium-high heat with a splash of oil (1 tsp); add the chickpeas, 1 teaspoon ground cumin, 1/2 teaspoon smoked paprika and 1/4 teaspoon salt. Cook, pressing occasionally with the back of a spoon to slightly smash a few beans, until they are warmed through and some have golden, crisped edges, about 6–8 minutes. (Browning the chickpeas intensifies their flavor and adds a pleasant textural contrast to the bowl.)

Make the tahini-lemon dressing: in a bowl whisk together 1/3 cup tahini, 3 tbsp fresh lemon juice, 1 tbsp maple syrup, 1 grated clove garlic, 1–2 tbsp water to thin and a pinch of salt and pepper until smooth and creamy. (Whisking gradually and adding water lets the tahini emulsify into a silky dressing rather than seizing up; the sweet element balances the lemon’s acidity.) Taste and adjust: more lemon for brightness, more water for pourability, or a pinch of salt to bring flavors forward.

Warm and season the roasted vegetables briefly: if vegetables were roasted ahead and are cold, rewarm them in a 400°F (200°C) oven on a sheet for 5–7 minutes or toss in the hot skillet for 1–2 minutes — this brings back crisped edges and melds flavors. Toss the sweet potatoes gently with 1/4 teaspoon salt and a pinch of black pepper; toss the zucchini and peppers with a sprinkle of red pepper flakes if you like heat. (Warming restores the roasted aromatics and prevents the bowl from feeling disjointed between hot and cold components.)

Build the bowls: for each of 4 bowls, place about 3/4 cup cooked quinoa (from the 3 cups cooked total) as the grain base. Add a generous handful (about 1.5 cups) of mixed greens to one side. Arrange 3/4 cup roasted sweet potato cubes, 1/2 cup roasted zucchini, and about 1/4 cup sliced roasted bell pepper in separate sections. Spoon 3/4 cup pan-crisped chickpeas into each bowl. (Layering ingredients so each component is visible invites diners to taste each flavor on its own or together.)

Finish and garnish: drizzle about 2–3 tablespoons of the tahini-lemon dressing over each bowl (or serve on the side). Finish with a grind of black pepper, a pinch of flaky sea salt, and an optional squeeze of lemon or sprinkle of chopped fresh herbs (parsley or cilantro). If you like extra richness, finish with a light drizzle of extra-virgin olive oil. (Finishing salts and acids brighten flavors and give the bowl a polished, restaurant-quality finish.)

Serve immediately so you get the contrast of warm roasted vegetables and chickpeas with cool greens and creamy dressing. Leftovers keep well — store components separately in airtight containers for up to 3 days (dressing 5 days) to preserve texture.