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 a resealable plastic bag. Pour the marinade over the chicken, turning each breast to coat evenly. Refrigerate for at least 15 minutes, or 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, a pinch of salt, and a crack of black pepper. Set aside.
05 - Remove the chicken from the marinade, allowing excess to drip off. Grill the breasts 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 - Place the asparagus 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 the Calabrian chili paste, 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 as desired.
08 - Arrange the rested chicken and grilled asparagus on serving plates. Drizzle generously with the Calabrian chili sauce and serve immediately.