Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus and toss the spears with 0.5 tbsp of olive oil, a pinch of sea salt, and a pinch of black pepper.
Spread the asparagus on the baking sheet and roast for 12-15 minutes until tender and slightly charred.
While the asparagus roasts, season the chicken breast on both sides with the remaining sea salt, black pepper, and dried oregano.
Heat the remaining 0.5 tbsp of olive oil in a 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 and the surface is beautifully browned.
Mince the garlic and add it to the skillet during the final 60 seconds of cooking to avoid burning, then squeeze the juice of the half lemon over the chicken.
Remove from heat and let the chicken rest for 3 minutes before slicing.
Serve the chicken alongside the roasted asparagus and warm quinoa for a complete, balanced plate.