Combine the olive oil, lemon juice, red wine vinegar, garlic powder, oregano, salt, pepper, and dill in a jar to make a Greek dressing, marinade.
Use half of the dressing to marinate the chicken. Marinate the chicken for 30-90 minutes ideally.
When ready to cook the chicken, remove the chicken from the marinade. Heat a skillet over medium-high heat. Cook the chicken for 4-5 minutes per side or until cooked through Exact cooking time will depend on the thickness of the chicken breast. Let the chicken rest and then slice or chop it into bite-sized pieces.
Prep the Greek salad by combining the cucumbers, tomatoes, olives, feta cheese, red onion, pepperoncini, and remaining dressing/mariande.
Assemble the bowls with cooked quinoa or rice, sliced chicken, Greek salad, and tzatziki.
