Separate the egg whites from the yolks.
In a mixing bowl, beat the egg yolks with the sugar until the mixture whitens and becomes creamy.
Loosen the mascarpone with a spoon to smooth it out.
Add to the sabayon (egg yolks + sugar) and whisk until smooth and creamy.
In a separate bowl, whisk the egg whites until stiff peaks form.
Gently fold 2/3 of the beaten egg whites into the mascarpone cream in 2 batches, working from bottom to top with a rubber spatula or hand whisk to avoid deflating the meringue.
Pour a little of this mixture over the remaining beaten egg whites, mixing gently, then combine the both preparations.
Pour a little strawberry coulis into each glass, then arrange a few pieces of ladyfinger biscuits on top.
Interlace slices of strawberries along the inner edge of the glass and between the pieces of biscuit for a decorative effect reminiscent of a french strawberry cake, with the strawberries visible through the glass.
Cut each strawberry lengthwise into 3 thin strips.
Spoon half the mascarpone cream into each glass.
Next, add a bit of diced strawberries and a drizzle of coulis, ensuring that the coulis touches the sides of the glass to create a visible layer on the outside.
Pour the remaining mascarpone cream over the top and refrigerate, preferably for a few hours, before covering with a layer of strawberry coulis.
You can pour immediately and refrigerate for at least 6 h. The tiramisu tastes much better after 24 hours. It improves with time, becoming firmer and frothier.