01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Place trimmed asparagus spears in a single layer on the prepared baking sheet, ensuring they are not overcrowded.
03 - Drizzle olive oil evenly over the asparagus. Sprinkle with kosher salt and black pepper. Toss gently to coat all spears thoroughly.
04 - Roast in the preheated oven for 12-15 minutes until asparagus is tender-crisp and edges are lightly caramelized.
05 - While asparagus roasts, combine balsamic vinegar and maple syrup in a small saucepan. Bring to a boil over medium heat.
06 - Reduce heat to simmer and cook for 4-5 minutes, stirring occasionally, until the mixture reduces by half and thickens to a syrup consistency.
07 - Transfer roasted asparagus to a serving platter. Drizzle the warm balsamic glaze evenly over the spears. Serve immediately while hot.