Season the chicken breast evenly on both sides with dried oregano, garlic powder, sea salt, and black pepper.
Heat the extra virgin olive oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and sear for 6 to 7 minutes per side, or until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 5 minutes before slicing it into thin strips.
While the chicken rests, halve the cherry tomatoes and dice the cucumber into bite-sized pieces.
In a large serving bowl, create a base with the fresh baby spinach and cooked quinoa.
Arrange the sliced chicken, cherry tomatoes, and cucumber over the spinach and quinoa.
Drizzle the entire bowl with fresh lemon juice and garnish with chopped fresh parsley before serving.