01 - Whisk together olive oil, lemon juice, garlic, oregano, salt, and black pepper in a small bowl until well combined.
02 - Place chicken breasts in a shallow dish or resealable bag. Pour the marinade over the chicken, turning to coat evenly. Marinate for at least 15 minutes, or up to 2 hours for deeper flavor penetration.
03 - Preheat grill or grill pan to medium-high heat, approximately 400°F.
04 - Toss the trimmed asparagus with a drizzle of olive oil, salt, and pepper until evenly coated.
05 - Grill chicken breasts for 5 to 6 minutes per side until golden and cooked through, reaching an internal temperature of 165°F. Transfer to a plate and rest for 5 minutes.
06 - Grill asparagus for 2 to 3 minutes, turning occasionally, until slightly charred and just tender.
07 - While the chicken grills, combine Calabrian chili paste, olive oil, white wine vinegar, honey, minced shallot, parsley, lemon zest, and a pinch of salt in a small bowl. Mix thoroughly and adjust seasoning to taste.
08 - Arrange grilled chicken breasts and asparagus on plates. Drizzle generously with Calabrian chili sauce and serve immediately.