2Sauté shallot and garlic in a pan until softened.
3Mix mayonnaise with the cooked shallot, garlic and a pinch of pepper.
4Boil potatoes until soft.
5Mash potatoes and spread them in the pan to make potato cakes.
6Cook beef mince until done, season with salt and pepper.
7Toast the burger buns.
8Assemble the burger: Spread the mayonnaise mixture on the bottom bun, add the beef patties with melted Reblochon, bacon, pickles, potato cakes and top with melted Reblochon and the top bun.