Start by preheating your oven and lining your pan with parchment paper. Mix crumbs, sugar, salt, and melted butter until it resembles damp sand. Press firmly into the pan and bake until lightly golden and fragrant.
In a saucepan, whisk sugar, cornstarch, and salt together before adding egg yolks, lemon juice, zest, water, and liqueur. Cook over gentle heat, stirring constantly, until thick and bubbling. Continue cooking briefly to ensure proper setting.
Strain the filling to remove zest and pour it over the baked crust. Let it cool at room temperature until a slight skin forms, then refrigerate for several hours until fully set and firm.
Grind freeze-dried strawberries with sugar into a fine powder. Combine with egg whites, cream of tartar, and salt, then heat gently over a double boiler until warm and smooth. This step ensures the sugar dissolves completely.
Whisk the heated mixture until glossy, fluffy peaks form. Spread the meringue over the chilled lemon layer, creating swirls and peaks for a beautiful finish. Serve immediately for best texture