Preheat oven to 400°F (200°C). Toss sweet potato, beets, and brussel sprouts with olive oil, garlic powder, onion powder, salt, and pepper. Roast for 30-40 minutes until tender.
Cook farro according to package instructions. Fluff and set aside.
Prepare the yogurt sauce by mixing Greek yogurt, lemon juice, minced garlic, chopped parsley, lemon zest, salt, and pepper.
Assemble bowls by dividing cooked farro, roasted vegetables, arugula, and garnishes. Drizzle with yogurt sauce and sprinkle with Parmesan and parsley if desired.
Notes
Feel free to add more herbs or adjust seasonings to taste.