Instructions

1. Mix the mayonnaise with the lemon juice and water, then crumble the cheese into it. Season with salt and pepper and mash with a fork to a coarse paste.
2. Slice the celery into thin, about 8cm long strips.
3. Core the apples then slice them into thin circles.
4. Arrange the apple slices and celery sticks on a plate, scatter some watercress and walnuts around them, then drizzle with the dressing.