Cut the cured pork into cubes. Peel and finely chop the onion. Clean and wash the cabbage and cut into wide strips. Clean, wash and cut tomatoes into pieces. Heat oil in a large pan. Brown the meat in it.
Add onion and cabbage and braise for 5 minutes. Fold in the tomatoes. Season to taste with salt and pepper. Mix crème fraîche and season with pepper. Put some crème fraiche on the cabbage. Add the rest of the crème fraiche extra and serve