On the red chopping board, trim any visible fat from the steak and slice thinly. Remember to wash hands thoroughly after handling raw meat.
On the green chopping board, peel and chop the red onion. Peel and crush the garlic. Remove the stem and seeds from the pepper and dice.
Grate the cheese and put into a bowl. Use a separate bowl for the crème fraiche and another for the salad.
Heat the pan until very hot. Add half of the oil and fry the steak slices with the Mexican spice. Cook until brown then remove to a plate, cover with foil and leave to rest.
Reduce the heat under the pan to medium. Add the remaining oil to the pan with the onion and fry for a minute. Add the garlic and pepper and continue to cook for a further minute.
Add the beans with sauce, heat through, then add the steak.
Meanwhile heat the tortillas according to the pack instructions.
Divide the steak mixture between 4 serving bowls. Serve the tortillas on a plate alongside the grated cheese , the creme fraiche and the salad. Bring everything to the table and allow everyone to make their own burritos.