Place the bacon in a heavy skillet over moderate heat and drain the fat. Transfer to paper towel. Cool and crumble.
Prepare your dressing. Mix mayonnaise with sour cream and curry powder. Thinly slice the Chinese cabbage and season with half of the mixture.
Cut chicken or turkey breast and tomato into thin slices.
Brush bread with a thin layer of dressing on one side. Divide the breast slices into 4 pieces, on them - half the seasoned cabbage. Top with four slices of bread dressing side up. Cover with tomato slices, sprinkle with bacon. Lay the last 4 slices of bread dressing side down.
Squeeze the sandwich carefully, trim off the crusts if you like. Cut each sandwich into 2 triangles. Poke with a skewer.