Cut the ready-made black buns in half and spread ketchup and mustard on each half. Prepare the lettuce, slice the tomato, and unwrap the cheese slices.
Cut the chicken breast into cutlet-sized pieces, pound them flat, season with salt and spices. Fry in a pan on both sides.
On the bottom half of the bun, layer lettuce, tomato, the hot chicken pieces, and immediately a slice of cheese on top - it should start melting on the meat. Cover with the other half and secure the stack with a skewer.
The burgers are ready. Enjoy!