Slice the beef rump into thin strips, about 0.5cm thick and place in a medium bowl. Peel and crush the garlic into the bowl. Add in the Mediterranean spice blend along with the salt, the red wine vinegar and a drizzle of olive oil. Mix well to marinate and set aside.
Remove the root from the cos lettuce and finely chop, finely slice the roma tomato and dice the cucumber and set aside.
Pour the Greek yoghurt into a small bowl. Pick the parsley leaves and finely chop. Zest the lemon and juice until you have 2tbs of lemon juice. Add the parsley, lemon zest and lemon juice to the yoghurt with a drizzle of olive oil and mix well. Taste and add salt and pepper if neccessary. TIP: add as little or as much lemon juice as you like depending on your taste preference
Heat a drizzle of olive oil in a large frying pan over a high heat. Being careful not to overcrown the pan, cook the beef in batches for 1-2 minutes, or until cooked through. Transfer to a medium bowl and keep warm.
Heat the mini tortillas in a sandwich press or microwave (place on a plate) for 10 seconds, or until warmed through
Place a helping of the cos lettuce, tomato and cucumber in the center of a mini tortilla. Top with the Mediterranean beef and spoon over the zesty yoghurt sauce. Enjoy!