Before baking, spread the sponge cake dough used to make tenderloin cake thinly and fully on the whole plate.

It is easy to understand: when making tenderloin cake, spread the dough evenly on the plate and bake it (into a cake)

ロースケーキ: meat pie and tenderloin cake;

スポンジ: The original meaning is sponge, and here is the abbreviation of スポンジケーキ (sponge cake);

きじ): Sheng Di This refers to the dough used to make cakes (that kind of thin and watery dough).

Thin (ぅすぅ): thin,

Flow (ながす): Let it flow, which means washing. This refers to the thin surface flow.

ぃっぱぃ: All, all.

きます: Barbecue.

You don't understand this aspect, please refer to it.