Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Trim the woody ends off the asparagus stalks and toss them on the baking sheet with 0.25 tbsp of olive oil and a portion of the sea salt and black pepper.
Roast the asparagus for 10-12 minutes until they are crisp-tender and slightly charred at the tips.
While the asparagus roasts, season the chicken breast evenly on both sides with the remaining sea salt, black pepper, and the finely chopped fresh rosemary.
Heat the remaining 0.5 tbsp of extra virgin olive oil in a large skillet over medium-high heat.
Place the chicken in the skillet and sear for 5-7 minutes per side, or until the internal temperature reaches 165°F and the outside is golden brown.
Reduce the heat to low, then add the minced garlic, lemon juice, and lemon zest to the pan, stirring for 1 minute to create a light pan sauce to coat the chicken.
Fluff the warm pre-cooked quinoa and plate it as a base, topping it with the lemon-herb chicken and the roasted asparagus stalks.