Pare six full-grown cucumbers, and cut into dice half an inch square. Butter a pudding-dish and put in a layer of the dice, sprinkling with lemon- and with onion-juice. Cover with fine crumbs seasoned with celery-salt, cayenne, or paprica, and butter-bits. Fill the dish in this order, covering all with peppered, salted, and buttered crumbs. Cover closely and bake one hour, then brown. Pass a sauce piquante with it, and thin slices of buttered brown bread.