Preheat your oven to 220°C (430°F). Line a large baking sheet with parchment paper for easy cleanup.
Trim the broccoli into bite-sized florets and peel the carrots before slicing them into similar-sized pieces to ensure even roasting.
In a mixing bowl, toss the broccoli and carrots with olive oil, making sure each piece is well coated. Sprinkle with salt, black pepper, and herbs if using.
Spread the vegetables out in a single layer on the prepared baking sheet, giving each piece space to crisp up.
Place the tray in the oven and roast for 20-25 minutes, shaking or flipping the veggies halfway through to promote even caramelization and crispy edges.
Watch for darkened, crispy edges on the broccoli and jammy, caramelized carrots—these signals mean they’re ready.
Remove from the oven and, if desired, squeeze fresh lemon juice over the vegetables for a bright, fresh contrast to their smoky sweetness.
Serve immediately while warm, enjoying the crispy edges, tender insides, and deep smoky flavor in every bite.