In a mixing bowl, combine the sliced strawberries and granulated sugar. Stir well and let them sit for about 15 minutes until they release their juices.
In another bowl, whip the heavy cream with the powdered sugar and vanilla extract until stiff peaks form. Add in the lemon zest, and mix gently to combine.
In a large serving dish or a rectangular cake pan, start layering by spreading a thin layer of whipped cream at the bottom.
Place a single layer of graham crackers on top of the whipped cream, covering the base completely.
Spoon a portion of the sugared strawberries over the graham crackers, spreading them evenly.
Add another layer of whipped cream on top of the strawberries, smoothing it out.
Repeat the layering process (graham crackers, strawberries, whipped cream) until all ingredients are used, finishing with a layer of whipped cream on top.
Cover the dish with plastic wrap and refrigerate for at least 4 hours or overnight. This allows the graham crackers to soften and the flavors to meld.
Before serving, garnish with additional fresh strawberries and mint leaves for a pop of color.
Notes
Slice into squares and serve on chilled plates. Drizzle with any remaining strawberry juices for added flavor.