A crêpe complète is a type of French galette made with buckwheat flour and filled with ham, cheese, and an egg. The egg can be cooked on the galette so it's either soft or hard.
It is a savory version of the more widely known sweet crêpes that are often filled with things like sugar, fruit, chocolate, or whipped cream. The "complète" in its name suggests that it is a full meal, combining protein, dairy, and the crêpe itself to make a satisfying dish.