For the lime curd: Combine the lime juice, sugar and butter in a medium saucepan and cook on a low flame until the butter melts. Beat the eggs, add to the saucepan and stir until combined. Bring to a simmer. Stir constantly and cook until the mixture is a thick and creamy consistency, 5 to7 minutes. Pass through a mesh strainer. Chill for 2 hours in the fridge.
For the crust: Add the sugar and graham crackers to a food processor. Pour in the melted butter and pulse to combine.
For the topping: Whip the cream with the sugar until stiff.
To assemble, layer the crumb mixture into the bottom of a serving cup, followed by the lime curd. Top with the whipped cream mixture and garnish with lime zest.