Beat the egg whites with 50 grams of sugar until they are thick and firm
Beat the yolks with the other 50 grams of sugar until they're pale and creamy.
Add the Greek yogurt and mix until smooth.
Gently fold in the egg whites using a spatula, lifting from the bottom to the top.
Dip the ladyfingers quickly into the cool espresso and place them in a serving dish.
Optional: Alternate layers of yogurt cream and soaked biscuits. Keep in mind that the original recipe wants only one layer of each component (ladyfingers, cream, and chocolate powder).
Finish with a thick cream layer on top.
Cover and refrigerate for at least 4 hours.
Right before serving, dust with unsweetened cocoa powder.
Store in the fridge for up to 2–3 days.