2Sauté shallots and garlic in a pan, season with salt and pepper.
3Mix cooked shallots and garlic with mayonnaise and black pepper.
4Boil potatoes until soft, mash and fry in a pan with oil and salt until golden brown.
5Cook the beef mince in a pan. Season with salt and pepper.
6Toast the burger buns.
7Assemble the burger: start with the bottom bun, add mayonnaise mixture, cooked beef mince and Reblochon cheese, bacon, pickles, and potato cakes. Finish with melted Reblochon cheese and top bun.