Marinate beef with garlic, salt, red chilli powder, cumin seeds, BBQ sauce and vinegar, leave for half an hour.
Then cook in oil and give smoke of charcoal. Mix chopped cabbage in mayonnaise.
Then apply mayonnaise mixture on 1 slice, then beef, then ketchup, on other slice, place cucumber slices and lettuce leaves.
Join both slices and cut in middle.
Yummy sandwiches ready to serve.