Seen in Brick Lane

Tartiflette (is a French dish from the Savoy region in the French Alps (Savoie and Haute Savoie départements). It is made with potatoes, reblochon cheese, lardons and onions.[1]
The word tartiflette is probably derived from the Arpitan word for potato, tartiflâ. ” This modern recipe was inspired by a truly traditional dish called “péla”: a gratin of potatoes and onions (without cheese) in a long-handled pan called a pelagic (shovel) in the Provence region of France. It was developed in the 1980s by the Union Interprofessional Reblochon to promote sales of reblochon,[2] as is confirmed also by Christian Millau (of the Gault-Millau Guide) in his gastronomic dictionary.
Tartiflette was first mentioned in a book of 1705, Le Cuisinier Royal et Bourgeois written by François Massialot and his assistant cook B. Mathieu.
The name derives from the Savoyard word for potatoes, tartifles, a term also found in Provençal. As many traditional dishes in the region the potato is a staple ingredient. Instead of the rest of nowadays France, Savoy as part of the Holy Roman Empire discovered the tubers earlier than the French. The Savoyards first heard of tartiflette when it began to appear on the menus of restaurants in the ski stations, conveying an image of authenticity and mountain terroir.
A common, related preparation found throughout the region is the Croziflette. The format of this adheres to that of the original dish in everything but the use of potatoes, in place of which are found minuscule squares of locally produced pasta, crozets de Savoie (usually made from buckwheat but sometimes durum). The name of this dish is a portmanteau of “crozet” and “tartiflette”.