Squeeze the juice of two oranges. Peel the remaining oranges so that the white skin is completely removed. Cut oranges into slices and halve them as desired. Clean, wash and finely chop the fennel.
Finely chop the fennel green. Wash and drain the lettuce leaves. Mix the lettuce leaves, fennel and oranges carefully and arrange on plates. For the marinade, mix orange juice and oil. Season with salt, pepper and fennel green.
Spread over the salad. Slice cheese over it. Sprinkle with walnut halves. Chop them as desired. Serve with fresh farmhouse bread.