Preheat oven to 420°F (215°C). Mix minced garlic with olive oil and set aside.
Line a baking sheet with parchment. Toss chopped vegetables with garlic-oil mixture, salt, pepper, and spices. Roast for 25 minutes, rotating every 10 minutes.
If using pre-cooked quinoa, reheat briefly. To cook from scratch, rinse quinoa, boil with water or stock (200 ml per 100 g), add salt and spices, then simmer for 15 minutes until liquid is absorbed.
Combine warm quinoa with roasted vegetables. Toss gently.
Top with optional butter, cheese, and a splash of lemon juice before serving.
Notes
For extra flavor, add your favorite herbs or spices.