Wash the meat, dab dry and cut into 3 steaks, season with salt and pepper. Heat the oil in an ovenproof pan and fry the meat for approx. 3 minutes, turning it over. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see
manufacturer) fry for another 6-7 minutes.
Cut the avocado in half, remove the core. Remove the flesh from the skin and cut into slices. Wash and peel the cucumber, cut it in half horizontally and cut it into slices. Wash and clean the chilli and cut into fine rings.
Mix vinegar, mustard and sour cream, season with sugar, salt and pepper. Remove meat from the oven. Wash chives, shake dry, cut into fine rolls and add to the dressing. Add cucumber and avocado to the dressing and mix.
Pluck meat apart with a fork. Mix in a bowl with barbecue sauce. Cut the rolls in half and toast them. Spread the salad and meat on the lower halves of the rolls, place the upper halves of the rolls on top, fix with wooden skewers and cut the rolls in half.
Add the rest of the salad.