In a small bowl, mix together olive oil, oregano, paprika, garlic powder, salt, and pepper. Rub this mixture all over the chicken breasts.
Place the seasoned chicken on a baking sheet lined with parchment paper and bake for 25-30 minutes, or until the internal temperature reaches 165°F (75°C). Let it rest for 5 minutes before slicing.
While the chicken is baking, prepare the quinoa. In a medium saucepan, combine the quinoa and water or chicken broth. Bring it to a boil, then reduce heat to low, cover, and simmer for about 15 minutes or until the liquid is absorbed. Fluff with a fork and set aside.
In a large bowl, combine the cherry tomatoes, cucumber, red onion, kalamata olives, and feta cheese. Drizzle the lemon juice over the salad and toss gently to combine.
To assemble the meal prep bowls, start with a base of quinoa in each container. Top with sliced chicken, followed by the Mediterranean salad.
Garnish with fresh parsley and additional lemon wedges if desired. Seal the containers and store in the fridge.