Steps
1. In a bowl, combine the olive oil, lemon juice, minced garlic, dried oregano, salt, and pepper to make the marinade.
2. Cut the chicken breast into bite-sized pieces and add them to the marinade. Toss well to coat the chicken. Let it marinate in the refrigerator for at least 30 minutes.
3. Meanwhile, prepare the tzatziki sauce by combining the Greek yogurt, grated cucumber, fresh dill, lemon juice, salt, and pepper in a bowl. Mix well and refrigerate until serving.
4. For the Greek salad, combine the cucumber, cherry tomatoes, red onion, Kalamata olives, feta cheese, extra virgin olive oil, red wine vinegar, dried oregano, salt, and pepper in a bowl. Toss gently to combine.
5. Preheat a grill or grill pan over medium-high heat. Thread the marinated chicken onto skewers. Grill the chicken skewers for 6-8 minutes, turning occasionally, until cooked through.
6. Serve the chicken souvlaki with the tzatziki sauce and Greek salad on the side.