Steps
1. In a bowl, mix olive oil, lemon juice, oregano, salt, and pepper to create a marinade.
2. Add the chicken breast to the marinade and let it sit for at least 30 minutes.
3. Preheat a grill or grill pan over medium heat.
4. Grill the chicken for about 6-7 minutes on each side or until cooked through and juices run clear.
5. Allow the chicken to rest for a few minutes, then slice it.
6. In a large bowl, combine mixed greens, cucumber, and cherry tomatoes.
7. Top the salad with the sliced grilled chicken.
8. Drizzle with any remaining marinade if desired and serve immediately.