Wikipedia
A galette-saucisse is a type of French street food item consisting of a hot sausage, traditionally grilled, wrapped in a cold type of crepe called galette de sarrasin or Breton galette. The French region known as Upper Brittany is the traditional homeland of galette-saucisse, especially the department of Ille-et-Vilaine and some parts of its bordering departments like CĂ´tes-d'Armor, Morbihan, Loire-Atlantique, Mayenne and Manche.
First created during the 19th century, the dish consists of two landmark food items of the cuisine of Brittany. Buckwheat, introduced in Brittany during the 15th century and largely cultivated in the region, is the main ingredient of Breton galette and was a common substitute of bread in poor families. Pork sausage is one of the food specialty of the Rennes area.
Galette-saucisse is very popular in Upper Brittany, especially at outdoor public events, outdoor markets and sports games. It is strongly associated with the Stade Rennais F.C. soccer team, the dish being often eaten at the Route de Lorient Stadium during soccer games.