Preheat oven to 425°F and line a large, rimmed baking sheet with parchment paper or a Silpat® baking mat. If using parchment paper, lightly spray with non-stick cooking spray. Set aside.
In a large mixing bowl, toss sweet potatoes, purple potatoes, Brussels sprouts, red onion, garlic, onion powder, and olive oil until vegetables are well coated. Season with salt and black pepper, to taste.
Spread the sweet potato mixture onto the prepared sheet pan in a single layer without overcrowding and roast in a pre-heated oven for 8-10 minutes. Stir vegetables and continue roasting another 8-10 minutes, or until sweet potatoes are fork-tender.
Remove sheet pan from oven and create 6 round, evenly spaced openings among the vegetables. Carefully pour an egg into each opening, keeping the yolk intact. Season with additional salt and pepper, if desired, and return the pan to the oven.
Bake for 6-8 minutes, or until the egg whites are set and the yolks reach the desired level of doneness. Remove sheet pan from oven and garnish with crushed kale chips or dried herbs of choice, if desired, and serve immediately with the roasted vegetables. Enjoy!