Heat a frying pan over a medium heat. Add in the lamb mince and cook for 5 minutes, until browned.
Stack the mountain breads on a baking tray (one on top of the other) and spread over tomato paste. Top with baby spinach, cooked mince, red onion, rosemary and grated cheese.
Bake in the oven for 7-10 minutes, or until edges of the mountain bread are golden and crispy.
Remove from the oven and top with greek yoghurt to serve.