Broccolini with Spicy Sesame Vinaigrette

INGREDIENTS

• Freshly ground black pepper
• 1/2 teaspoon crushed red pepper flakes plus more to taste
• 2 bunches broccolini (1 pound)
• 2 tablespoons plus 1 teaspoon toasted white sesame seeds
• 1 tablespoon toasted sesame oil
• 2 teaspoons minced garlic
• 2 tablespoons plus 1 teaspoon vegetable oil
• 1 tablespoon distilled white vinegar
• Kosher salt