01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper.
02 - Toss the broccolini with olive oil, kosher salt, and black pepper until evenly coated. Arrange in a single layer on the prepared baking sheet.
03 - Roast for 15–18 minutes, turning once halfway through, until the broccolini is tender and slightly charred at the edges.
04 - While the broccolini roasts, melt butter in a skillet over medium heat. Add fresh breadcrumbs and toast, stirring frequently, until golden and crisp, about 3–4 minutes.
05 - Add minced garlic to the skillet and cook for 1 minute until fragrant. Remove from heat and stir in parsley, chives, lemon zest, and red pepper flakes if using. Season with a pinch of salt.
06 - Transfer the roasted broccolini to a serving platter. Drizzle with freshly squeezed lemon juice and sprinkle generously with the garlic herb crunch topping. Serve immediately.