This is easy to prepare and makes a refreshing side salad or starter.
The salad:
Wash and spin dry the arugula (rocket). Peel the oranges and cut into bite-sized wedges, quarter the apples, remove the core, then cut into thin slices.
The dressing:
Mix the lemon juice with salt, pepper, a pinch of sugar and olive oil and pour over the ingredients.
Arrange the salad on a plate and sprinkle with the walnuts and freshly grated Parmesan.