Cook the quinoa in vegetable stock for 15 minutes and set aside.
Preheat the oven to 200°C (400°F).
Place the diced vegetables on a baking tray. Drizzle with olive oil, oregano, chili flakes, salt, and pepper, and toss to combine.
Roast the vegetables in the oven for 20-25 minutes, stirring occasionally for even cooking.
For the dressing, mix lemon juice, olive oil, tahini, and grated garlic in a small bowl.
In a serving bowl, add the cooked quinoa, top with the roasted vegetables, and drizzle with the dressing.
Garnish with fresh basil leaves and pomegranate seeds before serving.