01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper or foil.
02 - In a large bowl, whisk together 3 tablespoons olive oil, garlic, rosemary, thyme, oregano, lemon zest, lemon juice, salt, and pepper.
03 - Add chicken breasts to the bowl and toss to coat evenly. Let marinate for at least 10 minutes, up to 1 hour for deeper flavor.
04 - Arrange the chicken breasts on one side of the prepared baking sheet.
05 - Place asparagus spears on the other side of the baking sheet. Drizzle with 1 tablespoon olive oil, then sprinkle with salt and pepper. Toss gently to coat and spread out in a single layer.
06 - Roast in the preheated oven for 20–25 minutes, until the chicken is cooked through (internal temperature 165°F) and asparagus is tender and slightly caramelized. If using, sprinkle Parmesan over the asparagus for the last 5 minutes of roasting.
07 - Let chicken rest for 5 minutes before slicing. Serve with roasted asparagus.