Boil potatoes 15 min, drain.
Sauté onion in butter 6 min, add bacon, cook 6 min.
Deglaze with wine, reduce 30 sec.
Add in potato, salt and pepper.
Transfer to baking dish, top with halved reblochon (rind side up).
Bake 30 min at 200°C / 390°F (180°C fan).
Rest 5 minutes then serve.
