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. Allow to marinate for at least 15 minutes at room temperature, or refrigerate up to 2 hours 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 preheated 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 allow to 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.