Preheat the oven to 425°F (220°C) if your vegetables are not already roasted. High heat caramelizes the edges quickly, concentrating the vegetables' sugars for better flavor. Line a rimmed baking sheet with parchment or foil for easy cleanup.

If you need to roast: Cut the zucchini and eggplant into 1/2-inch coins or 3/4-inch cubes and the bell pepper into 1-inch strips. Place the 2 cups of prepared vegetables on the baking sheet, drizzle with 1 tablespoon olive oil, sprinkle 1/2 teaspoon kosher salt and a few grinds of black pepper and toss to coat. Roast in a single layer for 18–22 minutes, turning once halfway through, until edges are browned and the vegetables are tender. Roasting at high heat creates Maillard browning and texture contrast with the cool salad components.

If your vegetables are already roasted (as you noted), reheat gently: spread them on the baking sheet and warm at 350°F (175°C) for 6–8 minutes, or warm in a skillet over medium for 3–4 minutes with a splash of water or olive oil to loosen any sticky caramelization. You want them warm, not mushy — gentle reheating preserves texture.

Warm the quinoa (if cold) by placing it in a microwave-safe bowl for 30–45 seconds or tossing it in a hot, dry skillet for 1–2 minutes to remove chill and any clumping. Warm quinoa is fluffier and better at soaking up dressings; cooling makes it clump together and feel denser.

Make the lemon-oregano dressing: in a small bowl whisk together 1 tablespoon extra-virgin olive oil, 1 tablespoon lemon juice, minced garlic, 1 teaspoon oregano, 1/4 teaspoon black pepper and the remaining 1/4 teaspoon kosher salt. Whisking emulsifies the oil into the acid and garlic — this blooms the dried oregano and mellows the garlic's sharpness.

Prepare the fresh components: halve the cherry tomatoes, slice the cucumber thinly, and halve the Kalamata olives. These fresh elements provide crunch, acidity and briny depth that balance the roasted vegetables' sweetness.

Assemble the bowls: divide the warm quinoa between two shallow bowls. Arrange half of the roasted vegetables on each bowl (about 1 cup per bowl), add half the cucumber slices, half the cherry tomatoes and 4 Kalamata olives per bowl. Spoon 1 tablespoon of hummus onto each bowl (placing it on the quinoa or at the edge). The arranged components let diners mix textures and flavors as they eat.

Drizzle half the dressing over each bowl (about 1/2 tablespoon each), then season to taste with additional salt or lemon if needed. A light drizzle is enough — the hummus also adds creaminess and seasoning, so start light and adjust.

Finish and serve: if you like, sprinkle a pinch of flaky sea salt and a grind of black pepper, and add a small sprig of fresh oregano or a squeeze of lemon. Serve immediately while the roasted veg and quinoa are warm against the cool tomatoes and cucumber — that temperature contrast heightens flavor perception.

Storage note: store dressing in a sealed jar and keep components separately in the fridge up to 3 days. Assemble just before serving so cucumbers and tomatoes stay crisp and hummus doesn’t dry out.