In a large mixing dish, combine the oil, oregano, lemon zest and juice, paprika and salt. Toss everything together to coat. Allow to marinate for 10 minutes before grilling.
In a bowl, mix the yogurt, garlic and cucumber. Add salt to taste and set it aside.
On a gas grill, preheat the burners to high. Thread the marinated pork and peppers on four metal skewers in this order: alternating between them as you go. Grill for 3-4 minutes on each side or until cooked through and golden brown, turning once.
Enjoy with lettuce, yogurt mixture, chili sauce, and flatbreads (if desired).
