01 - In a small bowl, whisk together the olive oil, lemon juice, minced garlic, dried oregano, 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. Marinate for at least 15 minutes, or up to 2 hours refrigerated for deeper flavor penetration.
03 - Preheat an outdoor grill or grill pan to medium-high heat, approximately 400°F. Lightly oil the grates to prevent sticking.
04 - Toss the trimmed asparagus with a light drizzle of olive oil, salt, and freshly ground 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 form and the internal temperature reaches 165°F. Transfer to a plate and rest for 5 minutes before slicing.
06 - Arrange the asparagus spears across the grill grates perpendicular to the bars. Grill for 2 to 3 minutes, turning occasionally, until slightly charred and just tender-crisp.
07 - While the chicken rests, combine the Calabrian chili paste, 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 adjust seasoning to taste.
08 - Arrange the grilled chicken breasts and charred asparagus on serving plates. Drizzle generously with the Calabrian chili sauce and serve immediately.