01 - Preheat the oven to 425°F.
02 - Toss carrots, parsnips, sweet potato, and red onion with olive oil, thyme, salt, and black pepper on a baking sheet.
03 - Roast the vegetables for 30 to 35 minutes, stirring once halfway through, until tender and caramelized.
04 - Simmer quinoa with vegetable broth and salt in a covered saucepan over medium heat until liquid is absorbed, about 15 minutes; fluff with a fork.
05 - Whisk together olive oil, lemon juice, Dijon mustard, honey or maple syrup, salt, and black pepper in a small bowl until emulsified.
06 - In a large bowl, mix cooked quinoa, roasted vegetables, crumbled feta (if using), pumpkin seeds, and chopped parsley. Drizzle with vinaigrette and toss gently.
07 - Serve the salad warm, garnished with extra parsley or feta if desired.