蒸す: to steam

鍋なべに蒸し器むしきをかけて、肉にくまんを蒸むした。

I set the steamer on the pot and steamed meat buns.

甕かめでおかゆのように煮にたという考かんがえと、蒸むして食たべたという考かんがえがあります。

There is one view that it was boiled like porridge in a kame, and another that it was steamed.