Preheat your oven to 400°F and prepare a baking sheet with parchment paper.
Trim the woody ends off the asparagus and toss them on the baking sheet with 0.5 tablespoons of olive oil, a pinch of sea salt, and black pepper.
Roast the asparagus for 12 to 15 minutes until they are tender-crisp and slightly charred.
While the vegetables roast, season the chicken breast evenly with the remaining sea salt, black pepper, and fresh thyme.
Heat the remaining 0.5 tablespoons of olive oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and sear for 6 to 7 minutes per side until the internal temperature reaches 165°F and the exterior is golden brown.
Reduce the heat to low and add the minced garlic, lemon zest, and lemon juice to the skillet, spooning the pan juices over the chicken for 1 minute.
Serve the pan-seared chicken over a bed of pre-cooked quinoa alongside the roasted asparagus.