Christmas Eve - Dish 7 - celeriac salad

I apologize for my absence. My laptop had a crash. So,  I go back to continue publishing the Polish    recipes for  Christmas Eve .

1 medium celeriac
1 apple
3 tbsp lemon juice
10 gram of walnuts
10 gram of raisin
1/2 cup of natural yogurt
2 tbsp of mayonnaise
salt, black pepper.

Clean,peel and grate celeriac and apple. Pour  a lemon juice on vegetables. Chop walnuts and add to vegetables. Add also raisin. Mix yogurt, mayonnaise, salt and pepper and add to  vegetables. Mix the salad well and serve  immediately.