This diatomite steamer stone from Ishigaki's Karari Steam Magic line is baked in a toaster alongside bread. Soak the stone in water first; the fast-absorbing Karari diatomite takes in water quickly so you can start baking right away.
As the stone heats in the toaster, it releases steam that wraps around the bread, crisping the crust while keeping the inside soft and fluffy. The stone measures about 9.5 x 4 x 3.5 cm (3.7 x 1.6 x 1.4 in); simply place it next to the bread and run your usual toasting cycle, no extra settings are needed.
