To make a better crust, [Chris] used a pressure cooker fitted with a valve to inject steam into an oven through his oven’s exhaust. Not only does this gelatinate the starches in the bread crust ...

To steam-bake bread using this technique, place your lava rocks in a shallow metal pan or a heatproof dish. The pan should be wide enough to cover the lower rack of your oven. Preheat your oven to the ...