Rinse the quinoa under cold water and combine with 0.5 cup water in a small saucepan; bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes until fluffy.
Season the chicken breast evenly with the garlic powder, dried oregano, 0.125 tsp sea salt, and 0.125 tsp black pepper.
Heat 1 tsp of olive oil in a skillet over medium-high heat and sear the chicken for 6-7 minutes per side until the internal temperature reaches 165°F.
While the chicken rests, whisk together the remaining 1 tsp olive oil, lemon juice, and the remaining sea salt and black pepper in a small bowl to create the vinaigrette.
Place the shredded cabbage in a bowl and toss with half of the lemon vinaigrette to slightly soften the texture.
Slice the rested chicken breast into thin strips and arrange it over the cooked quinoa and dressed cabbage.
Drizzle the remaining vinaigrette over the entire bowl and garnish with fresh chopped parsley before serving.