For the dressing:
Place all of the ingredients in a small blender and blitz until the oregano is finely chopped.
For the tzatziki:
Blend all of the ingredients until you have a creamy consistency. Season with salt if needed.
For the lamb:
Slice the lamb into thin strips, and toss in the spices, seasoning and a little olive oil. Heat a frying pan until it is really hot, add a trickle of oil and then fry the lamb for just a minute or so. Add the tomato, onion and olives, and toss around until heated through. Spoon in some of the dressing.
Heat the flat bread either by holding with a pair of tongs over the hob gas flame, or in the oven/microwave.
Spread some of the feta tzatziki on the bread and then a portion of the lamb followed by a scattering of flat leaf parsley. Wrap or fold to secure, slice in half and serve drizzled with some additional dressing.
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