Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus spears and toss them on the baking sheet with 0.25 tbsp of olive oil, a pinch of sea salt, and black pepper.
Roast the asparagus for 10-12 minutes until they are tender and slightly charred at the tips.
While the vegetables roast, season the chicken breast evenly on both sides with the remaining sea salt, black pepper, and dried oregano.
Heat the remaining 0.5 tbsp of olive oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and sear for 5-7 minutes per side until the internal temperature reaches 165°F and the exterior is golden brown.
In the final minute of cooking, add the minced garlic, lemon juice, and lemon zest to the pan, swirling to combine and spooning the pan sauce over the chicken.
Remove from heat and serve the chicken immediately alongside the roasted asparagus and pre-cooked fluffy quinoa.