Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus and place them on the prepared baking sheet.
Drizzle the asparagus with 0.5 tbsp of olive oil and season with half of the sea salt and black pepper.
Roast the asparagus for 12-15 minutes until they are tender and slightly charred at the tips.
While the asparagus roasts, season the chicken breast evenly with the remaining sea salt, black pepper, chopped rosemary, and thyme.
Heat the remaining 0.5 tbsp of olive oil in a skillet over medium-high heat.
Place the chicken in the skillet and sear for 6-7 minutes per side, or until the internal temperature reaches 165°F.
Reduce the heat to low, add the minced garlic and the juice from the lemon half to the pan, swirling to coat the chicken for 1 minute.
Plate the chicken and roasted asparagus over the warm, fluffy quinoa and drizzle any remaining pan juices over the top.