Separate the egg yolks from the whites and place in two different bowls. Using a stand mixer or an electric mixer, whip egg yolks with 1/4 cup of sugar until they get pale yellow.
Add mascarpone cheese and continue whipping until fully combined. Set aside.
After that, again using a stand or an electric mixer, whisk egg whites with 1/4 cup of sugar, adding sugar slowly (french meringue method).
In a medium bowl slowly and carefully combine these two mixtures with spatula. Do not stir too much; just until combined.
When assembling, start with some filling. Then quickly dip the ladyfinger into the espresso and place it. Pour some cherry sauce, and repeat until layered.
Top with the dark chocolate shavings (divide evenly) and cherries, if desired.