01 - In a small bowl, whisk together the olive oil, lemon juice, minced garlic, dried oregano, and a generous pinch 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. Allow to marinate for at least 15 minutes at room temperature, 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 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 serving.
06 - Place the asparagus directly on the grill. Cook for 2 to 3 minutes, turning occasionally with tongs, until the spears are lightly charred and tender-crisp.
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.
08 - Arrange the grilled chicken breasts and charred asparagus on serving plates. Drizzle generously with the Calabrian chili sauce and serve immediately.