Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Trim the woody ends off the asparagus spears and place them in a single layer on the prepared baking sheet.
Drizzle 0.5 tbsp of extra virgin olive oil over the asparagus and toss to coat evenly.
Sprinkle a pinch of sea salt and black pepper over the asparagus, then roast for 12-15 minutes until tender and slightly charred.
While the asparagus is roasting, season the chicken breast on both sides with 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 6-7 minutes per side, or until the internal temperature reaches 165°F.
Reduce the heat to low and add the minced garlic to the skillet, sautéing for 30-60 seconds until fragrant.
Squeeze the juice of the half lemon over the chicken and sprinkle with fresh lemon zest before removing from heat.
Plate the chicken alongside the roasted asparagus and the warm cooked quinoa.