Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup.
Trim any rough ends off the broccolini and spread it out on the baking sheet.
Drizzle with olive oil and sprinkle with salt, pepper, garlic powder, and red pepper flakes. Toss to coat evenly.
Roast for 12-15 minutes, flipping halfway through, until the edges are slightly charred and crispy.
Remove from the oven and, if you’re feeling fancy, squeeze fresh lemon juice over the top and sprinkle with Parmesan.
Serve immediately and enjoy your Wicked-themed greens.