Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
In a small saucepan, combine the dry quinoa with 0.5 cup of water, bring to a boil, then reduce heat and simmer covered for 15 minutes.
Prepare the asparagus by snapping off the tough ends and tossing the spears with 0.5 tbsp of olive oil and a pinch of salt and pepper.
Spread the asparagus on the baking sheet and roast for 12 to 15 minutes until they are crisp-tender and slightly golden.
Season the chicken breast evenly on both sides with sea salt, black pepper, and dried oregano.
Heat the remaining 0.5 tbsp of olive oil in a skillet over medium-high heat and sear the chicken for 6 minutes per side until golden brown.
Lower the heat slightly and add the minced garlic, lemon juice, and lemon zest to the skillet, spooning the juices over the chicken for 2 minutes.
Fluff the quinoa with a fork and plate it alongside the roasted asparagus, topping the quinoa with the zesty chicken breast.