Peel the potatoes, cut them into ¼ in. slices, rinse them well, and boil them in lightly salted water with thyme at a moderate temperature without overcooking (15 minutes). Take them out to drain;
Heat the oil and white wine in a frying pan, sauté the onion, and when it melts add the bacon and the pepper;
Scrape the rind of the Reblochon and cut it crosswise in two slices;
Preheat the oven to 400℉ and prepare a gratin dish by rubbing its bottom and sides with a peeled garlic clove;
Spread half of the potatoes followed by the bacon, followed by the rest of the potatoes. On the top place the Reblochon slices;
Bake for about 20 minutes of cooking.
Notes
Alternatively:
Cut the potatoes into cubes and sauté them with the bacon and onions instead of boiling them separately to save time.