In a large bowl or a stand mixer whisk the egg yolks and sugar together until light and foamy. Add the mascarpone cheese and mix well. Set aside.
In a separate bowl or in a stand mixer, whisk the egg whites until they form stiff peaks.
Slowly fold the egg whites into the mascarpone cheese mixture. Being very gentle with your fold so you don't deflate the egg whites. Set aside.
Being layering your tiramisu. Have your serving dish ready, I recommend a glass dish so you can see the layers or use small bowls or glasses to make individual servings. Dip a lady finger biscuit in the cooled coffee for a quick second or two so it soaks in the coffee, then place it on your serving dish. Repeat with as many lady finger biscuits as you need to form a layer on the bottom of your dish. You may need to break a few in half to be able to cover the bottom of the pan. The biscuits are very fragile when soaked, so be gentle with them.
Spread the mascarpone egg mixture over the biscuits gently.
Repeat with another coffee soaked lady finger biscuit layer topped with the mascarpone egg mixture layer. You should end on the mascarpone egg mixture layer.
Use a small sieve to gently sprinkle on a thin layer of cocoa powder over the top of the whole dish.
Cover and refrigerate for at least 4 hours or overnight. Best served chilled!Enjoy!:)