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 piece to coat evenly. Let marinate at room temperature for at least 15 minutes, or refrigerate up to 2 hours for more pronounced flavor.
03 - Heat an outdoor grill or indoor 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, a pinch of salt, and a crack of black pepper, ensuring each spear is evenly coated.
05 - Place the marinated chicken breasts on the hot grill. Cook for 5 to 6 minutes per side until golden grill marks appear and the internal temperature reaches 165°F. Transfer to a plate and let 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 every minute, until lightly charred and crisp-tender. Remove 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, and lemon zest in a small bowl. Stir until smooth and season with salt to taste. Adjust the heat level by adding more chili paste if desired.
08 - Slice each chicken breast against the grain and fan the pieces across a plate. Lay a generous portion of grilled asparagus alongside. Drizzle the Calabrian chili sauce over the top and serve immediately.