01 - Preheat oven to 425°F. Line a large rimmed baking sheet with parchment paper for easy cleanup.
02 - Spread asparagus spears and carrot sticks in a single layer on the prepared baking sheet, ensuring pieces don't overlap for even roasting.
03 - Drizzle olive oil evenly over vegetables. Sprinkle with sea salt, black pepper, garlic powder, and dried thyme. Toss gently with hands or tongs to coat thoroughly.
04 - Roast for 22-25 minutes, flipping vegetables halfway through cooking time. Remove when tender-crisp and edges show light caramelization.
05 - Transfer roasted vegetables to a serving platter. Scatter fresh parsley and lemon zest over top while hot. Serve immediately as a side dish.