Clean the salad and wash thoroughly. Roast nuts in a pan without fat. Clean figs and quarter them. Peel one fig. Mix fig mustard, fig pulp, walnut oil and vinegar with a hand blender.
Season the vinaigrette with a little sugar, salt and pepper. Pluck the salad into bite-sized pieces and distribute on 4 small plates. Clean the oyster mushrooms and, depending on their size, possibly halve them. Heat sunflower oil in a pan.
Fry the mushrooms for 3-4 minutes and season with salt and pepper. Divide the fig quarters, walnut halves and oyster mushrooms between the 4 plates. Stir the vinaigrette again and sprinkle the salad with it.