01 - In a small bowl, whisk together 2 tbsp olive oil, lemon juice, minced garlic, dried oregano, and a generous pinch each of salt and black pepper until well combined.
02 - Place the chicken breasts in a shallow dish or a resealable plastic bag. Pour the marinade over the chicken, turning each breast to coat evenly. Allow to 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 a 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 freshly ground black pepper.
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 let rest for 5 minutes before slicing.
06 - Place the seasoned asparagus on the grill. Cook for 2 to 3 minutes, turning occasionally with tongs, until lightly charred and crisp-tender. Remove from the grill and set aside.
07 - While the chicken rests, combine the 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 salt or vinegar as desired.
08 - Arrange each grilled chicken breast alongside a generous portion of charred asparagus. Drizzle the Calabrian chili sauce generously over the top and serve immediately.