STEP 1/8
Turn egg yolks in the strongest step of the hand mixer for 30 seconds. Add 40g of sugar little by little and beat.
STEP 2/8
If foam marks remain when the whisk is lifted, turn it at the lowest level of the hand mixer for 1 minute to remove the remaining foam. Divide 40g of sugar into egg whites little by little and make meringue that bends the tip of the beak.
STEP 3/8
In egg yolk foam, mix the three-sieve flakes, cocoa powder, and meringue, dividing them 3 to 4 times. Combine melted butter and milk.
STEP 4/8
Mix a little bit of sheet dough, then add little by little to sheet dough. Pour the sheet dough into a pan, pat the floor two or three times to remove the bubbles, and bake in an oven preheated to 180 degrees for 10 minutes.
STEP 5/8
Add the dark cover cream and melt it by double boiling. Add sugar to whipped cream and whip until hand mixer marks remain.
STEP 6/8
Cut the cooled sheet in half horizontally and apply whipped cream. Place strawberries cut into appropriate sizes.
STEP 7/8
Roll up the sheet. Apply whipped cream on the other sheet, top with strawberries, and roll on the rolled sheet.
STEP 8/8
Fix the shape with parchment paper and shape it in the refrigerator for about an hour. Cover the sides of the cake with ganache on a silicone brush.