01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, toss broccolini with 2 tbsp olive oil and a pinch of salt. Spread in a single layer on the prepared baking sheet.
03 - Roast for 15-18 minutes, turning once halfway through, until broccolini is tender and edges are slightly crisp.
04 - Heat 1 tbsp olive oil in a small skillet over medium heat. Add minced garlic and red pepper flakes; cook for 30 seconds until fragrant, stirring constantly.
05 - Add panko breadcrumbs and cook, stirring often, until golden and crisp, 2-3 minutes. Remove from heat, stir in lemon zest and 1/4 tsp salt. Transfer to a bowl.
06 - Arrange roasted broccolini on a serving platter. Squeeze over juice of 1/2 lemon and season with black pepper. Sprinkle generously with chili-lemon breadcrumb crunch. Serve immediately.