Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper.
Toss all the chopped vegetables and whole garlic cloves with olive oil, salt, and pepper on the baking sheet. Spread them in a single layer.
Roast vegetables for 25-30 minutes, stirring halfway through, until they're golden brown and caramelized.
While the vegetables are roasting, rinse quinoa thoroughly under cold water using a fine-mesh strainer.
In a large pot, bring the vegetable broth to a boil. Add the rinsed quinoa, thyme, and bay leaf.
Reduce heat and simmer for 15 minutes, or until quinoa is tender and shows its spiral germ.
When vegetables are done, add them to the pot with the quinoa and broth.
Simmer everything together for 5-10 minutes to allow the flavors to meld.
Remove bay leaf, taste, and adjust seasoning as needed.
Serve hot, garnished with fresh parsley.