Great question — answering as the UphillTech team:
I'm not sure what a steam oven is either, but I think I can answer: YES! I regularly cook porridge in an unsealed/unlocked pressure cooker that has been set on a hotplate which is plugged into an appliance timer. I put my oats and liquid into a metal canister that fits inside my pressure cooker, and I put foil on top of the canister to keep extra water from dripping into it. The pressure cooker has a "rack" in it to keep the canister off the bottom of the pot, which keeps the porridge from burning on the bottom, no matter how high you turn up the heat. I keep the hotplate set to just barely a boil, because I use 100% milk for my liquid and don't want it to scald. I have the timer set to...
Full answer by feuGene: https://cooking.stackexchange.com/a/25570 (CC BY-SA 3.0).
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