01 - In a small bowl, whisk together 2 tbsp olive oil, lemon juice, minced garlic, dried oregano, and a generous pinch of salt and black pepper until well combined.
02 - Place the chicken breasts in a shallow dish or resealable plastic bag. Pour the marinade over the chicken, turning each piece to coat evenly. Let rest for at least 15 minutes at room temperature, or refrigerate up to 2 hours for more pronounced flavor.
03 - Heat an outdoor grill or grill pan to medium-high, approximately 400°F. Lightly oil the grates to prevent sticking.
04 - Toss the trimmed asparagus with a drizzle of olive oil, salt, and black pepper until evenly coated.
05 - Place the marinated chicken breasts on the hot grill. Cook for 5 to 6 minutes per side until golden grill marks appear and the internal temperature reaches 165°F. Transfer to a plate and let rest for 5 minutes before slicing.
06 - Arrange the asparagus spears across the grill grates perpendicular to the bars. Cook for 2 to 3 minutes, turning occasionally, until lightly charred and crisp-tender.
07 - While the chicken rests, combine Calabrian chili paste, 2 tbsp olive oil, white wine vinegar, honey, minced shallot, chopped parsley, lemon zest, and a pinch of salt in a small bowl. Stir until smooth and taste for seasoning, adjusting as needed.
08 - Slice the rested chicken breasts on a bias. Arrange alongside the grilled asparagus on each plate. Drizzle generously with the Calabrian chili sauce and serve immediately.