Wash and remove the tough outer parts of the cabbage; cut into thin strips. Cut the bacon into strips. Also cut the apple into small pieces and sprinkle with a tablespoon of lemon juice to prevent colouring.
Prepare the dressing by mixing the yoghurt with olive oil, mustard, vinegar, a tablespoon of lemon juice, salt and pepper.
Put the cabbage, bacon and apple in a bowl. Add chopped walnuts, mixed and seasoned seeds with yogurt sauce.
Toast the slices of bread, cut into cubes and add them to your salad.