The defining tension in a Sandwich Crudités is water against bread. Raw vegetables carry moisture, and a baguette is most of all a structure of crust and crumb that softens the moment that moisture reaches it, which sets the whole discipline of the build. The components are mild and familiar, grated carrot, sliced tomato, cucumber, butter lettuce, often a hard-boiled egg, bound with a vinaigrette or a thin mayonnaise, but the order and timing matter more than the list. Drier elements go against the crumb, the wet ones are held off the crust, and the sandwich is dressed and eaten close to assembly rather than left to sit.
The bread does the structural work and is the first thing to fail. A real crust holds its shape for a while against the tomato and cucumber; a soft loaf gives up by the third bite. The dressing carries the seasoning, since the vegetables bring crunch and freshness but almost no salt or fat, and the egg supplies the only weight in an otherwise light build. There is no anchor ingredient and no warm component, so quality is decided by the cut and condition of each vegetable and by how recently the whole thing was assembled. The Sandwich Crudités sits with the plant-forward builds the catalog groups under Sandwich Végétarien. Its specific contribution is moisture as a design constraint: a sandwich the bread loses if it waits.