Cake (apple soufflé cake) | Yuu Sweets researcher's recipe transcription

Cut the apple into quarters.
Hollow out the core and cut it in half, then cut it in half again.
Add 30g of sugar and mix until incorporated.
Once there are no more sugar particles left, let it sit for 20 to 30 minutes.

After the apples have been marinated for 15 minutes, prepare two bowls and separate the eggs into egg whites and yolks.
Chill the egg whites in the freezer for 5 to 10 minutes.
Add the remaining 20g of sugar from step 1 to the egg yolks and mix to mash.
Mix to incorporate air until the dough becomes whitish.
Add 1 drop of oil and mix well for 1 minute.
Add half of the remaining oil and mix.
Add all the oil and mix.
Loosely cover the apples from step 1 with plastic wrap, heat in the microwave for 3 to 4 minutes, then separate the apples and apple juice.
Add the apple juice to the dough bowl and mix.
Sprinkle the flour and mix.

Whip the egg whites.
Add the remaining pinch of sugar from step 2 and mix.
Add half of the remaining sugar and beat until frothy, 6 to 7 minutes.
Add all the sugar and whisk until it forms peaks.

Add a small amount of meringue to bowl 2 and mix thoroughly.
Add the remaining meringue and mix.

Lightly coat the pan with butter (not listed).
Arrange the apples on the bottom of the pot and pour the batter into them.
Drop the pot a few times to let the air out.
Cover and bake on low heat for 20-25 minutes.

熱いうちにお皿に乗せて完成。