Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
In a medium pot, combine the quinoa and vegetable broth (or water) and bring it to a boil. Once boiling, reduce the heat to low, cover, and simmer for about 15 minutes or until the liquid is absorbed.
While the quinoa is cooking, toss the chopped zucchini, bell pepper, carrot, and cherry tomatoes in a large bowl with olive oil, garlic powder, thyme, salt, and pepper.
Spread the vegetables evenly on the prepared baking sheet.
Roast the vegetables in the preheated oven for approximately 20-25 minutes or until they are tender and slightly caramelized. Stir halfway through for even cooking.
Once both the quinoa and roasted vegetables are ready, divide the quinoa among four bowls. Top with the roasted vegetables and add slices of avocado.
Garnish each bowl with chopped fresh parsley for added flavor and color. Serve warm.