Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
Pat the chicken breast completely dry with a paper towel and season both sides evenly with sea salt, black pepper, and dried oregano.
Place the asparagus spears on the prepared baking sheet, drizzle with half of the olive oil, and toss to coat.
Roast the asparagus in the oven for 12 to 15 minutes until the tips are slightly charred and the stalks are tender.
While the asparagus roasts, heat the remaining olive oil in a medium skillet over medium-high heat.
Add the chicken to the skillet and sear for 6 to 8 minutes per side, or until the internal temperature reaches 165°F.
In a small bowl, whisk together the lemon juice, lemon zest, and minced garlic.
During the last minute of cooking the chicken, pour the lemon-garlic mixture into the skillet to create a light pan sauce.
Plate the chicken alongside the roasted asparagus and garnish with fresh parsley.