To prepare the dressing cut the cheese in half and peel carefully. Put the cheese in a small saucepan and add the creme fraiche, but don’t heat until almost ready to serve the salad.
Mix the salad leaves together and arrange on serving plates. Slice the apple and put the slices in a small bowl. Sprinkle over a little cider, then pat dry with kitchen paper and arrange over the salad leaves.
Place the saucepan over a gentle heat and blend the cheese and creme fraiche together for 3-4 minutes until smooth, adding some cider if the cheese is not very ripe and runny. Be careful not to overheat the cheese.
Divide the dressing equally over the salad and finish with a scattering of croutons.