01 - In a small bowl, whisk together 2 tablespoons olive oil, lemon juice, minced garlic, dried oregano, and a generous pinch of salt and black pepper until well combined.
02 - Place chicken breasts in a shallow dish or a resealable plastic bag. Pour the marinade over the chicken, turning each breast to coat evenly. Let marinate at room temperature for at least 15 minutes, or refrigerate for up to 2 hours for more pronounced flavor.
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 and season with salt and pepper. Set aside near the grill.
05 - Remove chicken from the marinade, allowing excess to drip off. Place breasts on the hot grill and cook for 5 to 6 minutes per side until deeply golden and the internal temperature reaches 165°F. Transfer to a plate and rest for 5 minutes before slicing.
06 - Place the oiled asparagus spears directly on the grill. Cook for 2 to 3 minutes, turning occasionally with tongs, until slightly charred and tender-crisp. Remove and set aside.
07 - While the chicken rests, combine Calabrian chili paste, 2 tablespoons 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 salt or vinegar as needed.
08 - Arrange grilled asparagus on each plate alongside a rested chicken breast. Drizzle generously with the Calabrian chili sauce and serve immediately.