Instructions

1. 1

   Toast the walnuts briefly in a dry pan until fragrant, then chop them coarsely.

2. 2

   Core the apples and cut them with the celery into bite-sized pieces, then toss immediately with lemon juice to keep them bright.

3. 3

   Halve the grapes and remove any seeds.

4. 4

   Stir the yogurt and mayonnaise with a pinch of salt into a creamy dressing.

5. 5

   Fold everything together gently and let the salad rest for 15 minutes to develop its flavour.