The Cramique Garni is the breakfast sandwich of the French Nord, and it is built on a sweet bread the rest of France does not really make. The cramique is a brioche-adjacent loaf from the Hauts-de-France and the Belgian frontier: enriched with butter and eggs like a brioche, but lighter in sugar, leavened a little less aggressively, and studded with raisins (the standard version) or pearl sugar (the Belgian cramique au sucre). It is sold by the loaf at boulangeries across Lille, Roubaix, Tourcoing, and across the border in Mons and Charleroi, and it is most commonly eaten sliced and toasted with butter at breakfast.
The garnie version closes the loop and turns the bread into a sandwich. Two slices of cramique are spread with butter, sometimes with a fruit confiture, and assembled around a thin filling: most often a slice or two of jambon blanc, occasionally a soft cheese, in the most Belgian-leaning versions a smear of speculoos. The sandwich is small, sweet-savoury, and aggressively breakfast. It is the form factor the regional grandmother makes for a child going to school, and the form factor the brasseries of the Nord still keep on the morning menu for adults who treat their first coffee as a meal. The raisins inside the bread provide a low-grade fruit accent that the ham works against rather than with, and the result is a sandwich that tastes more like a snack than like a lunch.
The cousins are mostly regional cake-breads put to the same use. Belgian cramique au sucre is the same bread with pearl sugar instead of raisins, and produces a slightly sweeter sandwich that pairs better with cheese than with ham. The Vendéen gâche, the Auvergnat pogne de Romans (despite the name, that one is Drôme), and the Alsatian kougelhopf are all in the same enriched-sweet-bread orbit, and the Nord version is the one that has most clearly settled into sandwich service. The wider Brioche Garnie tradition covers the soft, sweet, enriched-bread sandwich category across France, and the cramique sits at its northern edge: a little less butter, a little more raisin, and a strong regional accent the rest of the country does not share.