Melt butter and add in graham cracker crumbs until toasted, fragrant, and crunchy.
Whip heavy cream with powdered sugar and a pinch of salt until you reach soft, fluffy peaks.
Beat fresh lemon juice, zest, lemon curd, powdered sugar, and salt together until fully combined.
Add heavy cream, and whisk until soft peaks form.
Pack the graham cracker crust at the bottom of your jars, add a layer of the lemon mousse, then a layer of lemon curd, another layer of lemon mousse, and top with whipped cream.
Garnish with some lemon zest, and voilà!
Refrigerate the assembled mousse for at least 4 hours for the best texture.
