01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - Spread trimmed asparagus and carrot sticks in a single layer on the prepared baking sheet.
03 - Drizzle vegetables with olive oil, sprinkle with sea salt, black pepper, and dried thyme. Toss to ensure even coating.
04 - Roast vegetables in the preheated oven for 20 to 25 minutes, turning halfway through, until tender and lightly browned.
05 - Remove from oven and immediately toss with lemon zest and lemon juice. Top with Parmesan cheese if desired. Serve warm.