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 into thick, even sticks about 1/2 inch wide. Trim the woody ends off the asparagus, keeping the spears whole.
In a large bowl, toss the carrots with 2 tablespoons of olive oil, a pinch of salt, and the honey or maple syrup if using. Spread them out on one side of the prepared baking sheet.
In the same bowl, toss the asparagus with 1 tablespoon of olive oil, a pinch of salt, and a bit of lemon zest or juice. Place the asparagus on the other side of the baking sheet, making sure they aren’t overcrowded.
Slide the baking sheet into the oven and roast for 20-25 minutes, flipping the vegetables halfway through. The carrots should become golden and tender, with caramelized edges, while the asparagus develops slight charring and remains vibrant green.
Check for doneness: the carrots should be deeply caramelized and easily pierced with a fork, and the asparagus should have a slight wobble but be tender and lightly charred.
Remove the vegetables from the oven and let them rest for 2 minutes. Drizzle with a little more lemon juice or olive oil, if desired, and sprinkle with herbs or toppings like feta or nuts for added texture.
Serve the roasted carrots and asparagus warm or at room temperature, enjoying their tender, caramelized, and smoky flavors—simple yet satisfying.