In a medium bowl, combine the 12 ounces (340 grams) strawberries, granulated sugar, and orange liqueur. Set aside for 20 minutes while you prepare the cream.
In a medium bowl, fold together the Mascarpone, powdered sugar, vanilla, and lemon zest just until combined. Do not overmix.
In another bowl, beat the heavy cream just until stiff peaks form.
Gently fold the beaten cream into the Mascarpone mixture just until combined.
Transfer the strawberry mixture to a blender and add the 1/4 cup (60 milliliters) water. Puree until smooth, then transfer to a wide bowl.
Dip one ladyfinger briefly in the strawberry mixture and place in the serving glass. Repeat to make a single layer of strawberry-covered ladyfingers. If needed, break the cookie in half to more easily fit into the glass.
Either spoon or pipe a layer of Mascarpone cream over the ladyfingers.
Repeat the process to make one more layer of ladyfingers and a final layer of Mascarpone cream.
Repeat with remaining glasses.
Cover each glass with plastic wrap and refrigerate for at least 4 hours to overnight.
Immediately before serving, garnish with sliced strawberries and optionally a fresh mint sprig.