Preheat your oven to 425°F (220°C).
Pat the chicken breast dry with paper towels. Season both sides lightly with salt, pepper, and a pinch of your mixed herbs.
In a small bowl, combine the lemon juice, olive oil, minced garlic, and additional herbs. Pour this marinade over the chicken, ensuring even coating.
Heat a non-stick skillet over medium-high heat. Place the chicken breast skin-side down (if applicable) or presentation side down and sear for 2-3 minutes until a golden crust develops.
Transfer the chicken to a baking tray and continue cooking in the preheated oven for about 10-12 minutes or until the internal temperature reaches 165°F (74°C).
Meanwhile, toss the asparagus with a light drizzle of olive oil, salt, and pepper. Spread on a baking sheet and roast in the oven for 8-10 minutes until tender and slightly crispy.
Heat the pre-cooked quinoa gently on the stovetop or in the microwave, fluffing with a fork.
To serve, plate a portion of quinoa, arrange the roasted asparagus alongside, and top with the crispy lemon-herb chicken. Drizzle any remaining marinade over the dish for an extra burst of flavor.