01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, toss broccolini with olive oil, sea salt, and black pepper until evenly coated.
03 - Spread broccolini in a single layer on the prepared baking sheet, ensuring pieces are not overcrowded.
04 - Roast for 15-18 minutes, flipping halfway through, until broccolini is tender-crisp with lightly browned, caramelized tips.
05 - While broccolini roasts, whisk together tahini, lemon juice, olive oil, maple syrup, and grated garlic in a medium bowl. Gradually whisk in water, 1 tbsp at a time, until smooth and pourable. Season with salt to taste.
06 - Transfer roasted broccolini to a serving platter. Drizzle generously with lemon tahini sauce. Garnish with toasted sesame seeds, lemon zest, and fresh parsley if using. Serve immediately.