Lightly oil a heavy-based frying pan Mix together the onion and garlic and fry gently until soft Put the minced lamb in a mixing bowl, add the onion mixture together with the oregano, cumin and lemon juice then mix thoroughly Divide the mixture into two and shape into patties Cook the patties under a pre-heated grill for about 8-10 minutes or until the meat is cooked Carve the patties into thin slices and serve in pitta pockets with the onion, tomato and cucumber sauce