Season the chicken breast evenly on both sides with half of the sea salt and black pepper.
Heat 0.5 tbsp of olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and cook for 6-7 minutes per side until golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a cutting board while you prepare the vegetables.
In the same skillet, add the remaining 0.5 tbsp of olive oil and the trimmed asparagus spears.
Sauté the asparagus for 4-5 minutes, turning occasionally, until they are bright green and show slight char marks.
Stir in the minced garlic, lemon zest, and red pepper flakes, cooking for 1 minute until the garlic is fragrant.
Pour the lemon juice into the pan to deglaze, using a wooden spoon to scrape up any flavorful browned bits from the bottom.
Slice the rested chicken breast into strips.
Serve the chicken and charred asparagus over a bed of warm cooked quinoa, drizzling any remaining pan juices over the top.