Right after cutting the apples; to a large bowl, add the cut apples and lemon juice. Mix the apples and lemon juice together (the lemon juice should keep the apples from turning brown).
To the bowl, add chopped celery, walnuts, raisins, honey, yogurt and sour cream. Mix together until the apples are evenly coated with the sour cream and yogurt.
Do a taste test and add more honey if needed.
This salad is best when served right after it's made.