Preheat your oven to 220°C (430°F). Line a baking sheet with parchment paper or a silicone mat for easy cleanup.
Peel the carrots if desired and cut them into 2-inch chunks. Trim the asparagus, leaving the spears whole.
In a large mixing bowl, toss the carrots and asparagus with 2 tablespoons of olive oil, ensuring each piece is evenly coated. This helps them roast evenly and develop flavor.
Sprinkle the vegetables generously with flaky sea salt and freshly cracked black pepper, then toss again to distribute the seasonings evenly.
Spread the vegetables in a single layer on the prepared baking sheet, making sure they aren’t overlapping to promote even roasting.
Place the baking sheet in the oven and roast for 20 to 25 minutes. Halfway through, gently shake the pan or flip the vegetables with tongs to promote caramelization.
Check for doneness: the carrots should be deeply amber and slightly charred at the edges, while the asparagus tips are crisp-tender and vibrant green. They should smell sweet, smoky, and toasted.
Remove from the oven and transfer to a serving dish. Squeeze fresh lemon juice over the warm vegetables to brighten their flavor.
If desired, sprinkle chopped fresh herbs over the vegetables for a fragrant, herbal finish. Serve immediately for the best texture and flavor.
