Start this recipe by marinating the beef. Rub the beef with 1 tbsp. olive oil. Place spice mix, coffee, cumin and chili into a bowl and mix together. Rub half over the meat and allow to marinate for 30 minutes. Meanwhile, make a sour cream by mixing together the cream, garlic, green chili, chopped coriander and the juice and zest of 1 lime. Season with salt and pepper and place into the fridge to chill. Heat a large pan and quickly seal the meat on both sides. Transfer to an oven dish and continue in the oven at 200°C for 5-8 minutes depending on it’s thickness. In the same frying pan, add in the remaining oil and fry together the onions and peppers along with the remaining spice mix for 5 minutes. To serve, remove the meat from the oven, allow it to rest for 3 minutes then slice it up thickly. To serve, heat the wraps and lay over the cooked beef strips, peppers and onions and serve the sour cream, salsa and avocado on the side.