Season the chicken breast on both sides with sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat until shimmering.
Place the chicken in the skillet and sear for 6 to 8 minutes per side, or until the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a plate.
In the same skillet, add the minced garlic and sauté for 30 seconds until fragrant.
Pour in the chicken broth and lemon juice, scraping up any browned bits from the bottom of the pan.
Stir in the fresh thyme and simmer the sauce for 2 minutes until slightly thickened.
While the sauce simmers, steam the asparagus for 4 to 5 minutes until tender-crisp.
Plate the cooked quinoa, top with the chicken breast, and spoon the lemon-herb sauce over the top.
Serve with the steamed asparagus on the side.