01 - Preheat an outdoor grill or grill pan to medium-high heat, approximately 400°F.
02 - Pat the chicken breasts dry with paper towels. Rub the chicken and asparagus evenly with olive oil, kosher salt, and black pepper.
03 - Place the chicken breasts on the grill and cook for 6 to 7 minutes per side until the internal temperature reaches 165°F.
04 - Add the asparagus to the grill during the last 4 to 5 minutes of the chicken's cooking time. Turn occasionally until crisp-tender with distinct grill marks.
05 - While the chicken grills, combine the chopped Calabrian chili peppers, olive oil, minced garlic, lemon juice, honey, and parsley in a small bowl. Season with salt and pepper to taste and stir until well blended.
06 - Transfer the grilled chicken to a cutting board and let it rest for 2 to 3 minutes. Slice if desired.
07 - Arrange the sliced chicken and grilled asparagus on serving plates. Drizzle generously with the Calabrian chili sauce and garnish with lemon zest and additional parsley.